65 T.C. 278">*278 Respondent has determined deficiencies in petitioner's income tax in the amounts of $ 31,448.85 and $ 119,777.13 for taxable years 1964 and 1965, respectively. Petitioner claims a refund in the amount of $ 146,595.72 for taxable year 1964. Concessions having been made, the sole issue remaining for our decision is whether, for purposes of computing the petitioner's qualified investment eligible for the section 38¹ credit1975 U.S. Tax Ct. LEXIS 36">*39 against tax, the basis of certain capital assets and improvements qualifying as new section 38 property constructed by petitioner includes depreciation on property used in the construction of those capital assets.

FINDINGS OF FACT

All of the facts have been stipulated and are so found. Those necessary to an understanding of the issue are set out below.

Petitioner United Telecommunications, Inc., formerly United Utilities, Inc. (hereinafter sometimes referred to as United), is a corporation formed under the laws of Kansas and having its principal office at Westwood, Kans., at the time the petition was 65 T.C. 278">*279 filed. Petitioner filed consolidated income tax returns for 1964 and 1965 on behalf of itself and its operating subsidiaries on a calendar year, accrual basis with the District Director of Internal Revenue, Wichita, Kans.

Petitioner has a number of operating subsidiaries1975 U.S. Tax Ct. LEXIS 36">*40 each of which is incorporated under the laws of the particular State in which it transacts business. Most of petitioner's subsidiaries are telephone companies, and one provides electric, natural gas, and water services. The operations and accounting methods of these subsidiaries are subject to regulation by the States in which their businesses are conducted.

Petitioner's subsidiaries regularly use their own motor vehicles and other equipment in the construction of new telephone plant property and electric, gas, and water plant property, which qualifies as new section 38 property. It has been the practice of these subsidiaries to capitalize the applicable depreciation of such equipment as part of the cost basis of the new property in the construction of which it is used, pursuant to requirements of Federal and State regulatory agencies having jurisdiction over each subsidiary.

The cost basis so calculated has been used for purposes of depreciating the new property and for purposes of computing the investment credit.

During 1964 and 1965, the amount of capitalized depreciation relating to the construction of new section 38 property with a useful life of 8 years or more and included1975 U.S. Tax Ct. LEXIS 36">*41 in those properties' investment credit base, by subsidiary, was as follows:

65 T.C. 278">*280 OPINION

The sole issue presented for our decision is one of first impression. It is (for purposes of computing the qualified investment on which the section 38 credit against tax is calculated): is the petitioner entitled to include1975 U.S. Tax Ct. LEXIS 36">*42 in the basis of self-constructed telephone and power plant properties that qualify as new section 38 property the capitalized depreciation of property used in its construction? ²

United contends that the term "basis," as used in section 46(c)(1)(A)³1975 U.S. Tax Ct. LEXIS 36">*44 with respect to the "qualified investment" upon which section 38 allows a credit against income tax, and as used in section 48(b)⁴ defining "new section 38 property," should be given its general and ordinary meaning. Petitioner rightly states that the economic basis of its constructed properties includes amounts of depreciation on assets used by petitioner to construct those capital assets and improvements. Commissioner v. Idaho Power Co., 418 U.S. 1">418 U.S. 1 (1974). Therefore, United argues, because there is no indication that Congress meant to give "basis" as used in the pertinent sections1975 U.S. Tax Ct. LEXIS 36">*43 any other definition than its normal meaning, that portion of section 1.46-3(c)(1), Income Tax Regs., emphasized below is invalid as being contrary to the statute:

65 T.C. 278">*281 Sec. 1.46-3(c)Basis or cost. (1) The basis of any new section 38 property shall be determined in accordance with the general rules for determining the basis of property. Thus, the basis of property would generally be its cost * * * and would include all items properly included by the taxpayer in the depreciable basis of the property * * * However, for purposes of determining qualified investment, the basis of new section 38 property constructed, reconstructed, or erected by the taxpayer shall not include any depreciation sustained with respect to any other property used in the construction, reconstruction, or erection of such new section 38 property. [Emphasis supplied.]

Respondent has broad authority to effect the purpose of the statute by promulgating regulations. Commissioner v. South Texas Co., 333 U.S. 496">333 U.S. 496 (1948). Where, as with the investment credit provisions, Congress has specifically given respondent authority to prescribe regulations necessary to carry out the statute's purpose, ⁵ respondent's regulations are entitled to a heavy presumption of validity. Fawcus Machine Co. v. United States, 282 U.S. 375">282 U.S. 375 (1931);1975 U.S. Tax Ct. LEXIS 36">*45 Robert E. Catron, 50 T.C. 306">50 T.C. 306, 50 T.C. 306">309 (1968). However, the statute always remains the primary authority and to the extent respondent legislates, thereby exceeding his authority to interpret the statute, his promulgation is void. Manhattan Co. v. Commissioner, 297 U.S. 129">297 U.S. 129 (1936); Boykin v. Commissioner, 260 F.2d 249 (8th Cir. 1958), modifying 29 T.C. 813">29 T.C. 813 (1958); Northern Natural Gas Co. v. O'Malley, 277 F.2d 128 (8th Cir. 1960); Fabian Tebon, Jr., 55 T.C. 410">55 T.C. 410 (1970).

In examining the challenged portion of section 1.46-3(c)(1), Income Tax Regs., quoted above, in the light of sections 46(c)(1)(A), 47(a)(1), and 48(b), we conclude that the regulation is valid in part and invalid in part.

The Revenue Act of 1962, 76 Stat. 960, added to the Internal Revenue Code of 1954 the investment credit against income tax. Subject to certain1975 U.S. Tax Ct. LEXIS 36">*46 limitations, the amount of investment credit allowed by section 38 is generally 7 percent of the taxpayer's "qualified investment." Sec. 46(a)(1). "Qualified investment" with respect to new section 38 property, the kind here involved, is defined by section 46(c)(1)(A). This section provides that such qualified investment is equal to an applicable percentage of the taxpayer's basis in new section 38 property. The applicable percentage depends upon the estimated useful life of the new section 38 property as set forth in section 46(c)(2). ⁶

65 T.C. 278">*282 In applying section 46(c)(1)(A) to constructed section 38 property, the statute places only one restriction on the meaning of "basis" 1975 U.S. Tax Ct. LEXIS 36">*47 and that restriction is contained in section 48(b). "Basis" is limited to that portion of the basis which is properly attributable to construction, reconstruction, or erection after December 31, 1961.

Both the House and Senate technical explanations of the bill contain identical statements regarding the basis of new section 38 property, as follows:

The basis of "new section 38 property" is to be determined under the general rules for determining the basis of property. Thus, the basis of property purchased or constructed would generally be its cost. * * * ⁷

Thus, it appears that Congress intended to make no distinction between purchased or constructed new section 38 property regarding the meaning of "basis," and furthermore, that Congress intended "basis" to be used in its general and ordinary sense; i.e., "cost." See sec. 1012.

With1975 U.S. Tax Ct. LEXIS 36">*48 respect to qualified investment in used section 38 property, the statute's treatment of "basis" confirms that Congress meant to use "basis" regarding new section 38 property in its general and ordinary sense as discussed above.

In defining qualified investment in used section 38 property, section 46(c)(1)(B) employs the term "cost" rather than the term "basis." Section 46(c)(1)(B) places on the "cost" of used section 38 property includable in qualified investment the same percentage limitations (defined by section 46(c)(2) according to useful life) as those placed on the "basis" of new section 38 property by section 46(c)(1)(A). "Cost" is defined by section 48(c)(3)(B), and differs significantly from the term "basis" as used by section 48(b).

Section 48(c)(3)(B) mandates a reduction in the basis of used section 38 property which is acquired as a replacement for, and is similar or related in use or service to used section 38 property disposed of by the taxpayer by the amount of the adjusted basis of the property disposed of. ⁸ The amount determined after such 65 T.C. 278">*283 reduction in basis is the "cost" of the used section 38 property that is used to compute qualified investment. 1975 U.S. Tax Ct. LEXIS 36">*49 Section 48(c)(3)(B) also excludes from "cost" so much of the basis of the acquired used section 38 property as is determined by reference to the adjusted basis of other property held at any time by the taxpayer acquiring the used property. However, where there has been a recapture of investment credit pursuant to section 47 with respect to the property disposed of, the two foregoing restrictions on basis that are applied to determine cost are not applied. Sec. 1.48-3(b)(3), Income Tax Regs.; see also examples contained in sec. 1.48-3(b)(4), Income Tax Regs.

The report of the Senate Finance Committee explains these provisions as follows:

To prevent a double allowance where used property is traded in on used property, or where used property is disposed of (otherwise than by casualty or theft) and other used property "similar or related1975 U.S. Tax Ct. LEXIS 36">*50 in service or use" is acquired as a replacement, the cost otherwise allowable for the used property acquired is reduced by the adjusted basis of the property disposed of in both of these types of cases. ⁹

With respect to the cost of used section 38 property includable in qualified investment, and thus eligible for the section 38 credit, it is clear that Congress sought to prevent a doubling effect of the credit by restricting the meaning of basis. It is also clear that Congress did not place these restrictions on the basis of new section 38 property. ¹⁰

Congress intended the investment credit1975 U.S. Tax Ct. LEXIS 36">*51 as a stimulus to encourage capital investment by reducing the net cost of acquiring assets. Regarding the economic effect of the credit, the report of the Senate Finance Committee stated the following:

The objective of the investment credit is to encourage modernization and expansion of the Nation's productive facilities and thereby improve the economic potential of the country, with a resultant increase in job opportunities and betterment of our competitive position in the world economy. The objective of the credit is to reduce the net cost of acquiring new equipment; this will have the effect of increasing the earnings of new facilities over their productive lives and increasing the profitability of productive investment. It is your committee's intent that the financial assistance represented by the credit 65 T.C. 278">*284 should itself be used for new investment, thereby further advancing the economy. Only in this way will the investment credit fully serve the overall national interest in greater productivity, a healthy and sustained economic growth, and a better balance in international payments. ¹¹

1975 U.S. Tax Ct. LEXIS 36">*52 Consistent with the overall policy to stimulate the economy, Congress enacted section 47(a)(1) to provide against those abusive cases where the sole inducement to dispose of and acquire section 38 property was the investment credit. Both the House and Senate committee reports indicate that the primary purpose of this recapture provision was -- "To guard against a quick turnover of assets by those seeking multiple credit." ¹²

The effect of section 47 is to allow a double credit to the extent no recapture is effected. Recapture is effected only to the extent the estimated useful life of the asset was longer than its actual life or service. Sec. 47(a)(1); sec. 1.47-1(a)(2)(i), Income Tax Regs. Thus, if section 38 property is disposed of or otherwise ceases to be section 38 property prior to the termination of its estimated useful life for purposes of determining1975 U.S. Tax Ct. LEXIS 36">*53 qualified investment under section 46(c), then in the year of disposition or cessation, a recomputation of qualified investment must be made by applying section 46(c)(2) to the actual number of years the property was used by the taxpayer as section 38 property. If the recomputation results in a decrease of investment credit allowable with respect to that property, then the taxpayer must increase his tax or reduce his investment credit carryover by the amount of the decrease. Sec. 47(a)(1) and (3); sec. 1.47-1(a)(1)(i), Income Tax Regs.

For example, if the estimated useful life of new section 38 property is 7 years, the section 38 credit is computed on the qualified investment determined by section 46(c) to be equal to two-thirds of its basis. If the asset is traded in for new section 38 property after 5 years, the credit on the property traded is recomputed as if its actual life were 5 years. Thus, the credit is still allowed on the qualified investment which is equal to one-third of its original basis. Secs. 47(a)(1), 46(c). Moreover, the 65 T.C. 278">*285 credit is allowed on the total purchase price of the new section 38 property acquired, limited only by the applicable percentages1975 U.S. Tax Ct. LEXIS 36">*54 of section 46(c)(2) according to its useful life. Therefore, to the extent the basis of the new section 38 property is determined by reference to the basis of the property traded, on which there is partial or no recapture, there is a double allowance of the credit. To the extent investment credit is recaptured, there is no double allowance.

Respondent maintains that petitioner's position requires a result that effectively grants a double investment credit: first on the basis of acquired qualified property; second on the basis of that same property to the extent it is capitalized as construction-related depreciation and included as a construction cost in the basis of constructed section 38 property. Petitioner argues that, even so, there is no statutory support for respondent's regulation which is unreasonable in its definition of the basis of constructed section 38 property for determining qualified investment.

The key to resolution of the issue in the instant case is found in the definition of "section 38 property" contained in section 48(a)(1). This section provides that "section 38 property" means, inter alia, tangible personal property, but includes "only property with respect1975 U.S. Tax Ct. LEXIS 36">*55 to which depreciation * * * is allowable and having a useful life * * * of 4 years or more." Thus, if in a given taxable year a depreciation deduction is not allowable on property, then that property ceases to qualify as section 38 property. Sec. 1.48-1(b)(1), Income Tax Regs.

If petitioner employed section 38 property to construct its own capital assets and all the depreciation on that section 38 property were construction related in a given taxable year, then all that depreciation would have to be capitalized and could not be allowed as a deduction. Commissioner v. Idaho Power Co., 418 U.S. 1">418 U.S. 1 (1974). The obvious conclusion is that the section 38 property used in the construction would cease to qualify as section 38 property. Section 47(a)(1) would then require a recapture of credit according to the property's actual term of service as section 38 property. However, the basis of the constructed capital asset would include the construction-related depreciation. If the constructed capital asset qualified as new section 38 property, then its basis, including the capitalized depreciation, would be used in computing qualified investment according to 1975 U.S. Tax Ct. LEXIS 36">*56 its estimated useful life.

65 T.C. 278">*286 The respondent's regulations take a different tack. Regulations section 1.48-1(b)(4)¹³ provides that for purposes of qualifying as section 38 property, any property with respect to which a depreciation deduction is not allowed in a given taxable year because it must be capitalized, nevertheless shall be treated as property on which a depreciation deduction is allowable in the current year. Under this regulation, no investment credit on section 38 property used solely in the construction of the taxpayer's own capital assets is recaptured.

1975 U.S. Tax Ct. LEXIS 36">*57 Though it is less than conceptually correct, this regulation is eminently reasonable and consistent with the statute. Without such treatment, gross abuses would be allowed to flourish. As long as some depreciation would be allowable, the property would continue to qualify as section 38 property. For example, taxpayers could use section 38 property for construction of their own capital assets 11 months a year and for other purposes during the 12th month. Because some depreciation would be allowable, there would be no recapture of credit. Moreover, the construction-related depreciation capitalized in the basis of the constructed asset would be eligible for the section 38 credit, assuming the constructed asset qualified. Section 1.46-3(c)(1) of the regulations is designed specifically to prevent this abuse, and to that extent is reasonable and consistent with the statute's purpose. ¹⁴

1975 U.S. Tax Ct. LEXIS 36">*58 However, regulations section 1.46-3(c)(1) goes too far. This regulation prohibits the petitioner from including in the basis of constructed section 38 property, for purposes of determining 65 T.C. 278">*287 qualified investment, all construction-related depreciation with respect to any property.

We think that construction-related depreciation with respect to assets with useful lives of less than 4 years or to assets acquired prior to January 1, 1962, should be properly included in the basis of constructed section 38 property for purposes of determining qualified investment. No investment credit has been allowed with respect to these assets and, therefore, the abuse-prevention scheme of regulations sections 1.46-3(c)(1) and 1.48-1(b)(1) and (4) is inapplicable.

Although neither party has called it to our attention, we note that the legislative history of new section 46(d), added to the Code by the Tax Reduction Act of 1975, Pub. L. 94-12 (Mar. 29, 1975), contains language at odds with the legislative history of the investment credit as enacted by the Revenue Act of 1962 and with our holding herein. New section 46(d) introduces to the investment credit provisions the term "qualified progress1975 U.S. Tax Ct. LEXIS 36">*59 expenditures" by which a taxpayer may, at his election, increase his qualified investment by these "expenditures" as defined by section 46(d)(3).

In partial explanation of these "expenditures," the House and Senate committee reports accompanying the Tax Reduction Act of 1975 contain identical language as follows:

qualified progress expenditures would not include any depreciation sustained with respect to other property (machinery, equipment, etc.) used in the construction of new section 38 property (because such depreciation is not part of the basis for purposes of section 38), * * * [H. Rept. No. 94-19, 94th Cong., 1st Sess. 38 (1975); S. Rept. No. 94-36, 94th Cong., 1st Sess. 46 (1975).]

We think the parenthetical remarks quoted above deserve little weight. As the Supreme Court has said, "the views of a subsequent Congress form a hazardous basis for inferring the intent of an earlier one." United States v. Price, 361 U.S. 304">361 U.S. 304, 361 U.S. 304">313 (1960); see also Waterman Steamship Corp. v. United States, 381 U.S. 252">381 U.S. 252, 381 U.S. 252">268, 381 U.S. 252">269 (1965); United States v. United Mine Workers, 330 U.S. 258">330 U.S. 258, 330 U.S. 258">281-284 (1947);1975 U.S. Tax Ct. LEXIS 36">*60 cf. Biddle v. Commissioner, 302 U.S. 573">302 U.S. 573, 302 U.S. 573">582 (1938). However, we have not altogether disregarded the statements, and we have treated them as" a secondarily authoritative expression of expert opinion." Bobsee Corp. v. United States, 411 F.2d 231, 237 n. 18 (5th Cir. 1969).

65 T.C. 278">*288 We note that the statute itself does not change the definition of "new section 38 property" contained in section 48(b), discussed supra, nor does it change the meaning of "basis" as used in section 46(c)(1)(A) concerning qualified investment. What the statute does do is liberalize the definition of "qualified investment," at the taxpayer's election, with respect to constructed new section 38 property. Certain amounts invested in constructed new section 38 property now may be added to qualified investment prior to the placement of the property in service. Compare sec. 46 (c)(1)(A) with sec. 46(d)(4). Section 46(d) is effective for taxable years ending after December 31, 1974.

As we have pointed out, the legislative history of the investment credit at the time of its enactment states without reservation that the basis of new section 381975 U.S. Tax Ct. LEXIS 36">*61 property is to be determined under the general rules for determining basis, i.e., cost. See n. 7 supra, and accompanying text. We think this language must prevail to the extent a conflict exists between it and the parenthetical remarks in the House and Senate committee reports on new section 46(d) because it evolved out of the deliberations and debates which gave birth to the whole statutory scheme of the investment credit. Moreover, the use of "basis" in the definition of new section 38 property (sec. 48(b)) and in the definition of "qualified investment" (sec. 46(c)(1)(A)) has remained unchanged since those sections were first enacted by the Revenue Act of 1962.

When the investment credit was "restored" (Revenue Act of 1971, 85 Stat. 497) after it had been terminated (Tax Reform Act of 1969, 83 Stat. 487), Congress adopted the prior statutory scheme intact with three major changes unrelated to the issue here. H. Rept. No. 92-533, 92d Cong., 1st Sess. 24 (1971); S. Rept. No. 92-437, 92d Cong., 1st Sess. 17 (1971). ((1) The useful life brackets for determining qualified investment under section 46(c)(2) were each shortened by one year. (2) Restrictions were placed on the1975 U.S. Tax Ct. LEXIS 36">*62 eligibility of foreign-produced machinery and equipment for the credit. (3) Public utility property was made eligible for a 4-percent rather than a 3-percent credit.) Thus, in "restoring" the investment credit, Congress relied substantially and predominantly on the thought and examination given to the investment credit provisions by its predecessor. We see no good reason why we should not do likewise.

65 T.C. 278">*289 It should also be noted that because the investment credit provisions were enacted expressly to encourage investment in and modernization of facilities and equipment by reducing the net cost of acquiring assets, this Court and others have held that the investment credit provisions are to be liberally construed. Northville Dock Corp., 52 T.C. 68">52 T.C. 68 (1969); Robert E. Catron, 50 T.C. 306">50 T.C. 306 (1968); Minot Federal Savings & Loan Assn. v. United States, 435 F.2d 1368 (8th Cir. 1970); Norfolk Shipbuilding & Drydock Corp. v. United States, 321 F. Supp. 222">321 F. Supp. 222 (E.D. Va. 1971).

In view of the foregoing analysis and with due regard to the weighty presumption of its validity, 1975 U.S. Tax Ct. LEXIS 36">*63 we are compelled to hold that portion of the regulations quoted in the footnote ¹⁵ to be unreasonable and plainly inconsistent with the statute, but only to the limited extent that it excludes from basis for purposes of determining qualified investment in new section 38 property, the construction-related depreciation attributable to property on which no investment credit has been allowed.

To the extent that the regulation is concerned with construction-related depreciation attributable to section 38 property on which an investment credit has been allowed, it is valid.

Because of concessions,

Decision will be entered under Rule 155.

Wilbur, J., concurring: This case concerns the application of the investment credit provisions to self-constructed property whereby a taxpayer uses property A to self-construct property B. Even though property A and property B meet the statutory definition of qualified property, the regulations deny a "double credit" by requiring that the credit be taken on property A and that the basis of property A be excluded from property B for purposes of computing the investment credit on property B. While hardly free from doubt, the regulations are not plainly 65 T.C. 278">*290 inconsistent with the statute. ¹

1975 U.S. Tax Ct. LEXIS 36">*65 The regulation in question (sec. 1.46-3(c)(1)) provides:

(c) Basis or cost. (1) The basis of any new section 38 property shall be determined in accordance with the general rules for determining the basis of property. Thus, the basis of property would generally be its cost (see section 1012), unreduced by the adjustment to basis provided by section 48(g)(1) with respect to property placed in service before January 1, 1964, and any other adjustment to basis, such as that for depreciation, and would include all items properly included by the taxpayer in the depreciable basis of the property, such as installation and freight costs. However, for purposes of determining qualified investment, the basis of new section 38 property constructed, reconstructed, or erected by the taxpayer shall not include any depreciation sustained with respect to any other property used in the construction, reconstruction or erection of such new section 38 property. (See paragraph (b)(4) of section 1.48-1) * * * [Emphasis added.]

The majority broadly construes this regulation to exclude from the basis of self-constructed property (property B) any depreciation on other property (property A) 1975 U.S. Tax Ct. LEXIS 36">*66 used in the construction process. When the other property (property A) used in self-constructing assets does not qualify for the investment 65 T.C. 278">*291 credit, this interpretation of the regulation denies any credit, and the emphasized portion of the regulation is therefore declared invalid by the majority.

If this interpretation of the regulation is correct, the regulation is invalid. However, the regulation can and should be construed in pari materia with related provisions of the regulations to achieve the same result without declaring it invalid. Immediately following the sentence the majority invalidates is a specific reference to section 1.48-1(b)(4), Income Tax Regs.Section 1.48-1 deals in its entirety with the definition of "section 38 property," that is, property qualifying for the investment credit. Section 1.48-1(a), in providing a general definition of qualifying property, states that it must be property on which depreciation is allowable. Subsection 1.48-1(b) dealing with the issue of when property otherwise within the definition of qualifying property is property on which depreciation is allowable, states:

(b) Depreciation allowable. (1) Property is not section1975 U.S. Tax Ct. LEXIS 36">*67 38 property unless a deduction for depreciation (or amortization in lieu of depreciation) with respect to such property is allowable to the taxpayer for the taxable year. A deduction for depreciation is allowable if the property is of a character subject to the allowance for depreciation under section 167 and the basis (or cost) of the property is recovered through a method of depreciation, including, for example, the unit of production method and the retirement method as well as methods of depreciation which measure the life of the property in terms of years. If property is placed in service (within the meaning of paragraph (d) of section 1.46-3) in a trade or business (or in the production of income), but under the taxpayer's depreciation practice the period for depreciation with respect to such property begins in a taxable year subsequent to the taxable year in which such property is placed in service, then a deduction for depreciation shall be treated as allowable with respect to such property in the earlier taxable year (or years). Thus, for example, if a machine is placed in service in a trade or business in 1963, but the period for depreciation with respect to such machine1975 U.S. Tax Ct. LEXIS 36">*68 begins in 1964, because the taxpayer uses an averaging convention (see section 1.167(a)-10) in computing depreciation, then, for purposes of determining whether the machine qualifies as section 38 property, a deduction for depreciation shall be treated as allowable in 1963.

* * *

(4) If depreciation sustained on property is not an allowable deduction for the taxable year but is added to the basis of property being constructed, reconstructed, or erected by the taxpayer, for purposes of subparagraph (1) of this paragraph a deduction for depreciation shall be treated as allowable for the taxable year with respect to the property on which depreciation is sustained. Thus, if $ 1,000 of depreciation sustained with respect to property no. 1, which is placed in service in 1964 by taxpayer A, is not allowable to A as a deduction 65 T.C. 278">*292 for 1964 but is added to the basis of property being constructed by A (property no. 2), for purposes of subparagraph (1) of this paragraph a deduction for depreciation shall be treated as allowable to A for 1964 with respect to property no. 1. However, the $ 1,000 amount is not included in the basis of property no. 2 for purposes of determining 1975 U.S. Tax Ct. LEXIS 36">*69 A's qualified investment with respect to property no. 2. See paragraph (c)(1) of section 1.46-3.

[Emphasis added.]

Paragraph (b)(1) makes it clear that, while depreciation may not be allowable during the year property is placed in service due to a particular depreciation convention, a deduction for depreciation shall be considered as allowable for purposes of determining whether the machine qualifies as section 38 property. Paragraph (b)(4) also makes it clear that, while depreciation on property used to self-construct another asset must be carried over to the self-constructed asset, the property used in the construction process will be deemed depreciable for purposes of subparagraph (1) of this paragraph. Both paragraphs assume and deal with a situation where the property used in the construction process is itself section 38 property, rather than nonqualifying property as the majority assumes.

Regulations section 1.48-1(b)(4) and section 1.46-3(c)(1) (invalidated in part by the majority) contain reciprocal cross references. Furthermore, since they both deal with the same matter, they must be construed in pari materia, as it is indeed clear they were intended to be 1975 U.S. Tax Ct. LEXIS 36">*70 construed. By construing these regulations together, it is clear they were intended only to disallow a double credit and advise the taxpayer which property to claim the credit on rather than to deny any credit at all. Since Treasury regulations constitute contemporaneous constructions by those charged with the administration of the statutes, they must be sustained unless "plainly inconsistent" with the statute. This is particularly true where the Commissioner's regulatory authority derives not only from the general rule-making authority granted in section 7805, but also under a specific mandate contained in the statutory provisions being construed. See William F. Sanford, 50 T.C. 823">50 T.C. 823, 50 T.C. 823">832 (1968), affd. per curiam 412 F.2d 201 (2d Cir. 1969), cert. denied 396 U.S. 841">396 U.S. 841 (1969). Properly construed, the regulation is not plainly inconsistent with the statute.

The majority apparently feels that its interpretation of the regulation is not only clear, but clearly inconsistent with the 65 T.C. 278">*293 statute. But if it is clear to the majority, it must have been clear to Congress; and Congress has in the1975 U.S. Tax Ct. LEXIS 36">*71 sum total of its actions through the years, clearly indicated that the regulation incorporates the rule of the statute.

Congress has reenacted and expanded provisions of the investment credit with specific knowledge of the construction placed upon the statute by the regulations. The investment credit was added by the Revenue Act of 1962 and amended in the Revenue Act of 1964. The regulations in question were promulgated by TD 6731 on May 7, 1964, and have not been amended since that time. During the 11 years those regulations have been in effect, the investment credit was suspended, ² restored, ³ repealed, ⁴ reenacted, ⁵ and substantially broadened. ⁶ All of these congressional actions required Congress to deal with basis problems, and no change in the applicable statutory language has occurred during the entire 11-year period the regulations have been on the books.

1975 U.S. Tax Ct. LEXIS 36">*72 While this alone might not be enough, in the last legislative action taken by Congress (Pub. L. 94-12 (Mar. 29, 1975)), the rule provided by the regulation was specifically commented upon (in a virtually verbatim restatement), approved, and incorporated in the statute. (Sec. 46(d)(3)). In greatly expanding the investment credit, Congress added provisions to the statute making the credit applicable to certain work in progress, even though the property has not yet been "placed in service." In doing so, the credit was made available for "qualified progress expenditures," defined by the statute (to the extent here relevant) as follows:

(3) Qualified progress expenditures defined. -- For purposes of this subsection --

(A) Self-constructed property. -- In the case of any self-constructed property, the term "qualified progress expenditures" means the amount which, for purposes of this subpart, is, properly chargeable (during such taxable year) to capital account with respect to such property. [Emphasis added.]