Walter R. and Melynda H. Ripley (the Ripleys) appeal a decision of the tax court holding them responsible for gift tax in the amount of $93,300 pursuant to 26 U.S.C.A. § 6901(a)(1)(A)(iii) (West 1989). See Ripley v. Commissioner, 105 T.C. 358, 1995 WL 655347 (1995). The sole issue on appeal is whether the Internal Revenue Service (the IRS or the Service) timely notified the Ripleys of their liability for the tax. See 26 U.S.C.A. § 6901(c) (West 1989). For the reasons set forth below, we hold that the notification was not timely and accordingly reverse.

In 1983, Mrs. Mildred M. Ripley, Walter Ripley's mother, gave the Ripleys real property valued at $93,300. That same year, Mrs. Ripley also made a gift of property that she valued at $84,139 to her son Joseph. Mrs. Ripley filed an appropriate gift tax return based on these values and paid the applicable tax prior to the due date of the return in April 1984. Thereafter, the IRS concluded that the parcel of property given to Joseph actually was worth significantly more than the value reported by Mrs. Ripley.

Prior to the expiration of the three-year limitations period for assessment of additional gift tax liability against Mrs. Ripley, see 26 U.S.C.A. § 6501(a) (West Supp.1996), on October 22, 1986, the IRS and Mrs. Ripley entered an agreement, reduced to writing on a Form 872, extending the time in which the IRS could assess the tax, see 26 U.S.C.A. § 6501(c)(4) (West Supp.1996). Form 872 is a document developed by the IRS to solicit a taxpayer's agreement to extend the time in which the Service may assess a tax.1 The language of the applicable Form 872 provided:

(1) The amount of any Federal Gift ... tax due on any return(s) made by or for [Mildred Ripley] for the period(s) ended December 31, 1983 may be assessed at any time on or before April 18, 1990. However, if a notice of deficiency in tax for any such period(s) is sent to the taxpayer(s) on or before that date, then the time for assessing the tax will be further extended by the number of days the assessment was previously prohibited, plus 60 days.

(2) This agreement ends on the earlier of the above expiration date or the assessment date of an increase in the above tax that reflects the final determination of tax and the final administrative appeals consideration.

J.A. 40. On February 9, 1990, with 68 days remaining in the limitations period for assessing the tax as extended by Form 872, the Commissioner of Internal Revenue mailed Mrs. Ripley a notice of deficiency for $467,183. Thereafter, Mrs. Ripley filed an action in the tax court challenging the amount of the deficiency.

Negotiations between Mrs. Ripley and the Service resulted in an agreement pursuant to which the tax court would enter a stipulated decision establishing Mrs. Ripley's tax liability at $239,124. The agreement further provided that Mrs. Ripley would waive any further review of the tax court decision and any restrictions on immediate assessment of the tax imposed on the Service by 26 U.S.C.A. § 6213(a) (West Supp.1996). The tax court entered the stipulated decision pursuant to this agreement on February 25, 1992, and the Commissioner assessed the additional tax against Mrs. Ripley on April 7, 1992.

Although the record is not clear, it appears that Mrs. Ripley failed to pay the assessed tax. Accordingly, on September 17, 1993, the IRS notified the Ripleys that they were liable for $93,300 in tax, plus interest, as donees2 of Mrs. Ripley's 1983 gift. The Ripleys petitioned the tax court, contending that the one-year period of limitations for assessment of transferee liability prescribed in 26 U.S.C.A. § 6901(c)(1) had expired. The tax court, however, ruled that the notices of transferee liability were timely and that the Ripleys were liable for the tax. The Ripleys now appeal that decision.3

The limitations period within which the IRS may proceed against a transferee or donee of a gift for unpaid gift tax is established in 26 U.S.C.A. § 6901(c), which provides:

(c) Period of Limitations.--The period of limitations for assessment of any such liability of a transferee or a fiduciary shall be as follows:(1) Initial transferee.--In the case of the liability of an initial transferee, within 1 year after the expiration of the period of limitation for assessment against the transferor.

The parties agree that the notices of transferee liability were mailed to the Ripleys on September 17, 1993 and that, accordingly, if the period of limitations for assessing gift tax against Mrs. Ripley ended more than one year prior to that date, the notices of transferee liability were not timely. Consequently, the dispositive issue presented is when the limitations period for assessing the gift tax against Mrs. Ripley ended.

Generally, the IRS is required to assess tax liability within three years of the date on which the return to which the tax is related was filed. 26 U.S.C.A. § 6501(a). However, the Service and a taxpayer may extend the otherwise applicable limitations period by entering a written agreement prior to expiration of the period. 26 U.S.C.A. § 6501(c)(4). Prior to assessing tax, the Service must notify the taxpayer of the amount of the deficiency it has determined. See 26 U.S.C.A. §§ 6212, 6213 (West 1989 & Supp.1996). The notice of deficiency serves as a jurisdictional gateway permitting the taxpayer to petition the tax court for review of the deficiency within 90 days of the notification. See Abrams v. Commissioner, 787 F.2d 939, 941 (4th Cir.), cert. denied, 479 U.S. 882, 107 S. Ct. 271, 93 L. Ed. 2d 248 (1986); Robinson v. United States, 920 F.2d 1157, 1158 (3d Cir.1990). In addition, the issuance of a notice of deficiency suspends the limitations period for assessment of the tax against the taxpayer during the 90-day period. 26 U.S.C.A. § 6503(a)(1) (West Supp.1996).4 And, the IRS is prohibited from assessing tax against the taxpayer during this 90-day period as well. 26 U.S.C.A. § 6213(a). If the taxpayer petitions for review before the tax court within the 90 days, the limitations period and prohibition on assessment is further suspended until the tax court decision becomes final, and for 60 days thereafter. 26 U.S.C.A. § 6503(a)(1). The decision of the tax court becomes final "[u]pon the expiration of the time allowed for filing a notice of appeal, if no such notice has been duly filed within such time." 26 U.S.C.A. § 7481(a)(1) (West 1989). A notice of appeal must be filed within 90 days of the date the decision of the tax court is entered. 26 U.S.C.A. § 7483 (West 1989).

Utilizing this statutory scheme, the tax court calculated that the time period for assessing gift tax against Mrs. Ripley did not end until October 1, 1992: Mrs. Ripley extended the limitations period for assessment of the gift tax until April 18, 1990, and prior to that date, on February 9, 1990, the Service mailed a notice of deficiency, suspending the limitations period for 90 days. Because Mrs. Ripley filed a petition of review in the tax court within this 90-day period, the limitations period was suspended further until the decision of the tax court became final--90 days after the February 25, 1992 decision of the tax court since Mrs. Ripley did not seek review of the tax court decision--and for an additional 60 days, until July 24, 1992. Further, because 68 days remained in the extended limitations period after the notice of deficiency was sent, the limitations period for assessment did not end, according to the tax court, until 68 days after July 24, 1992, or until October 1, 1992. See, e.g., United States v. Hans, 921 F.2d 81, 82 (6th Cir.1990) (noting that the number of days remaining in the limitations period when IRS issues a notice of deficiency remain after the § 6503(a)(1) suspension ceases). Because the IRS mailed the notifications of transferee liability to the Ripleys within one year of this date, on September 17, 1993, the notices were, under the reasoning of the tax court, timely.

The Ripleys do not disagree with the application of the statutory scheme undertaken by the tax court. They acknowledge that by operation of law, the mailing of a notice of deficiency suspends the running of the limitations period. And, they recognize that the courts of appeals to have addressed the question agree that § 6503(a)(1) suspends a limitations period established by an agreement entered in accordance with § 6501(c)(4). See Meridian Wood Prods. Co. v. United States, 725 F.2d 1183, 1188 (9th Cir.1984); Ramirez v. United States, 210 Ct. Cl. 537, 538 F.2d 888, 893, cert. denied, 429 U.S. 1024, 97 S. Ct. 642, 50 L. Ed. 2d 625 (1976). They contend, however, that because the Form 872 Mrs. Ripley signed agreeing to extend the period of assessment contains language expressly providing that the agreement would terminate upon a specified date, that language is controlling. The date specified for termination of the agreement is critical, they assert, because the termination of the extension of time for assessment begins the running of the one-year limitations period during which the IRS must notify a donee of transferee liability pursuant to § 6901(c). Further, they argue that the date specified for termination of the agreement contained in the Form 872 signed by Mrs. Ripley was more than one year prior to the mailing of the notices of transferee liability to the Ripleys and therefore that these notices were untimely.5

A Form 872 is not a contract, but a waiver of a limitations period. See, e.g., Holof v. Commissioner, 872 F.2d 50, 52 (3d Cir.1989); see also Stange v. United States, 282 U.S. 270, 276, 51 S. Ct. 145, 147, 75 L. Ed. 335 (1931) (waiver of limitations period is not a contract but a "voluntary, unilateral waiver of a defense by the taxpayer"). Nevertheless, when a taxpayer qualifies the waiver of the limitations period on specified conditions, those conditions cannot be ignored. United States v. Hodgekins, 28 F.3d 610, 614-15 (7th Cir.1994) (holding that the IRS could not induce a taxpayer to relinquish the protection afforded by the statute of limitations based on a representation contained in the extension agreement drafted by the IRS and then disregard the condition); see also United States v. National Steel Corp., 75 F.3d 1146, 1151 (7th Cir.1996) (indicating that conditions recited in a waiver of applicable limitations period are enforceable against IRS); Grunwald v. Commissioner, 86 T.C. 85, 89, 1986 WL 22077 (1986) (noting that "[a] deal is after all a deal, and fairness dictates that both parties adhere to the provisions of the [Form 872-A] document they both voluntarily signed").

Furthermore, though a Form 872 is a waiver of the applicable limitations period, not a contract, many courts have recognized that principles of contractual interpretation must be utilized in construing them. See, e.g., Holof, 872 F.2d at 52. Consequently, because the IRS drafted the Form 872, including the language specifying the date of termination of the extension agreement, to the extent that the language is ambiguous it is construed against the IRS. See Anthony v. United States, 987 F.2d 670, 673-74 (10th Cir.1993); Roszkos v. Commissioner, 850 F.2d 514, 516-17 (9th Cir.1988), cert. denied, 489 U.S. 1012, 109 S. Ct. 1121, 103 L. Ed. 2d 183 (1989).

We agree with the Ripleys that Mrs. Ripley's waiver of the limitation period for assessment was valid only until the extension agreement, by its terms, ended. Thus, the extension agreement terminated upon the date specified therein; and, if that date was more than one year prior to September 17, 1993, the notices of transferee liability were not timely.

As the tax court recognized, an application of the plain language of Form 872 leads to the conclusion that the agreement for extension of time for assessment of tax against Mrs. Ripley ended more than one year prior to September 17, 1993. The Form 872 executed by Mrs. Ripley and the IRS provided, "This agreement ends on the earlier of the above expiration date or the assessment date of an increase in the above tax that reflects the final determination of tax and the final administrative appeals consideration." J.A. 40. We need not set forth at length our calculation of the first date referenced because the second date--"the assessment date of an increase in the above tax that reflects the final determination of tax and the final administrative appeals consideration"--clearly was prior to September 17, 1992.6

The Service assessed the tax against Mrs. Ripley on April 7, 1992, and as the tax court recognized, this was a final assessment because Mrs. Ripley had stipulated to the amount of the tax and had waived further review of the stipulated decision of the tax court. Therefore, the agreement Mrs. Ripley entered with the IRS to extend the date for assessment expressly provided that it would terminate (i.e., the last date for assessing taxes would be) on April 7, 1992, a date clearly more than one year prior to the September 17, 1993 mailing of the notices of transferee liability to the Ripleys.

In sum, the plain language drafted by the IRS in the Form 872 Mrs. Ripley executed dictates a conclusion that the time period for assessing tax against her ended April 7, 1992. Accordingly, the notices of transferee liability mailed to the Ripleys on September 17, 1993 were issued more than one year after the time for assessing tax against Mrs. Ripley ended and hence were not timely. Therefore, we reverse the decision of the tax court that the notices of transferee liability were timely.

REVERSED.