115 T.C. 118">*119 OPINION

RUWE, JUDGE: The matter before the Court is a Motion For Leave to File Notice of Intervention (Embodying Notice of Intervention) by Curtis T. Freeman (Mr. Freeman) with respect to petitioner's claim for relief from joint liability under section 6015. ¹

BACKGROUND

Mr. Freeman was previously married to petitioner, and he and petitioner filed a joint return for 1993, which is the year in issue. Although Mr. Freeman is not a petitioner in this case, he objects to petitioner's claim for relief from joint liability.

At the time the petition was filed, petitioner was a resident of Hartsville, South Carolina. At the time Mr. Freeman filed his motion, he was also a resident of Hartsville, South Carolina.

During 1993, petitioner and Mr. Freeman were married to each other. They2000 U.S. Tax Ct. LEXIS 52">*55 separated sometime during 1993 and, in May 1995, they were divorced. Their joint Federal income tax return for 1993 included a Schedule C, Profit or Loss From Business, for a farming activity. The reported gross income from this activity was $ 802, the claimed expenses totaled $ 28,199, and the reported net loss was $ 27,397. Respondent disallowed the $ 27,397 loss on the ground that the farming activity was not engaged in for profit. There were other adjustments to the return that flowed from the disallowed loss. On December 23, 1996, respondent issued separate notices of deficiency to petitioner and Mr. Freeman. The deficiency shown in each notice was $ 7,781. Petitioner filed a timely petition, but Mr. Freeman did not. Respondent assessed the deficiency against Mr. Freeman. No portion of 115 T.C. 118">*120 the assessment has been paid by Mr. Freeman, nor has he challenged the assessment in any other court.

Petitioner has not challenged the disallowed farming activity loss. The only claim being made by petitioner is that she is entitled to relief from joint liability. The case was tried before Special Trial Judge Couvillion on January 12, 1998. Mr. Freeman was not called to testify and made no appearance2000 U.S. Tax Ct. LEXIS 52">*56 until the instant motion. At the time of the trial, section 6013 contained the provisions governing relief from joint liability or what has come to be known as "innocent spouse" relief. Approximately 6 months after the trial, section 6013(e) was repealed and replaced with section 6015. See Internal Revenue Service Restructuring and Reform Act of 1998 (RRA 1998), Pub. L. 105-206, sec. 3201, 112 Stat. 685, 734. The RRA 1998 generally revised and expanded the relief available to joint filers. Moreover, the RRA 1998 gave section 6015 retroactive effect in that it was made applicable to any liability for tax arising after July 22, 1998, and to any liability for tax arising on or before such date that remained unpaid as of July 22, 1998. See RRA 1998, sec. 3201(g)(1), 112 Stat. 740; Corson v. Commissioner, 114 T.C. 354">114 T.C. 354, 114 T.C. 354">359, 2000 U.S. Tax Ct. LEXIS 30">2000 U.S. Tax Ct. LEXIS 30, 114 T.C. No. 24">114 T.C. No. 24 (2000).

Following the change in the applicable law, respondent was ordered to file a written report on respondent's position with respect to petitioner's claim for relief under the new law. In respondent's report, he stated: "In light of the aforementioned change in the law, it appears to respondent that petitioner qualifies for innocent spouse relief under2000 U.S. Tax Ct. LEXIS 52">*57 the provisions of section 6015(b)." Respondent further stated that petitioner's former spouse, Mr. Freeman, objected to such relief and that Mr. Freeman "should be provided with adequate notice and an opportunity to become a party to this proceeding" and cited section 6015(e)(4). The Court then directed respondent to serve Mr. Freeman with a copy of the petition and a copy of Interim Rule 325. ² Thereafter, within the time prescribed in Interim Rule 325, Mr. Freeman 115 T.C. 118">*121 submitted to the Court a document that was filed as a Motion For Leave to File Notice of Intervention (Embodying Notice of Intervention) (the motion). The motion was served on the parties. Respondent filed a notice of no objection, and petitioner has not responded.

2000 U.S. Tax Ct. LEXIS 52">*58 DISCUSSION

We have recently issued several opinions involving claims for relief from joint liability in which we noted significant differences between section 6015 and the repealed section 6013(e). See 114 T.C. 354">Corson v. Commissioner, supra; Charlton v. Commissioner, 114 T.C. 333">114 T.C. 333 (2000); Fernandez v. Commissioner, 114 T.C. 324">114 T.C. 324 (2000); Butler v. Commissioner, 114 T.C. 276">114 T.C. 276 (2000). For example, in 114 T.C. 354">Corson v. Commissioner, supra, we observed:

     Whereas section 6013(e) had offered only a single avenue of

   relief, based on a spouse's lack of knowledge or reason to know

   of a substantial understatement, section 6015 authorizes three

   types of relief. Subsection (b) provides a form of relief

   available to all joint filers and similar to, but less

   restrictive than, that previously afforded by section 6013(e).

  Subsection (c) permits a taxpayer who has divorced or separated

   to elect to have his or her tax liability calculated as if

   separate returns had been filed. Subsection (f) confers

   discretion upon the Commissioner to grant equitable relief,

  2000 U.S. Tax Ct. LEXIS 52">*59 based on all facts and circumstances, in cases where relief is

   unavailable under subsection (b) or (c).

     Subsections (a), (e), and (g) of section 6015 address

   general and procedural aspects relating to the operation of the

   section and the role therein to be played by this Court and by

   the Commissioner. * * *

  [114 T.C. 354">Id. at 359-360.]

When this case was tried, section 6013(e) was still in effect. Section 6013(e) was subsequently repealed and replaced by section 6015. Section 6013(e) is no longer applicable in this case. Under these circumstances, the Court will treat petitioner's claim for relief from joint liability as a claim under section 6015. ³ See Corson v. Commissioner, supra 114 T.C. 354">114 T.C. 364; Charlton v. Commissioner, supra 114 T.C. 333">114 T.C. 339; Butler v. Commissioner, supra 114 T.C. 276">114 T.C. 281-282.

There are several jurisdictional2000 U.S. Tax Ct. LEXIS 52">*60 bases upon which this Court may review a claim for relief from joint liability under section 6015. One basis, which survives section 6013(e), is 115 T.C. 118">*122 the traditional petition based on a notice of deficiency where the petition includes a claim by one or both spouses for 115 T.C. 118">*123 relief from joint liability. Relief claimed in this context has traditionally been characterized as an affirmative defense, and the enactment of section 6015 has not negated this Court's authority to consider a claim for such relief in a "deficiency proceeding". See Corson v. Commissioner, supra 114 T.C. 354">114 T.C. 363; Charlton v. Commissioner, supra 114 T.C. 333">114 T.C. 338-339. The instant case is a deficiency proceeding.

Another situation in which this Court has jurisdiction to review a claim for relief from joint liability involves the collection due-process procedures of sections 6320 and 6330. Among the issues that can be considered under sections 6320 and 6330 are "the underlying tax liability" and "appropriate spousal defenses". Sec. 6330(c)(2).

Section 6015(e)(1)(A) also provides this Court with jurisdiction to consider a claim for relief from joint liability by specifically allowing a spouse who elects relief under section2000 U.S. Tax Ct. LEXIS 52">*61 6015 to petition this Court for review of the Commissioner's determination regarding an administrative claim for relief. Unlike a deficiency proceeding or a collection due-process proceeding, a proceeding under section 6015(e)(1)(A) is restricted to the issue of relief from joint liability for the individual electing such relief. A proceeding under section 6015(e)(1)(A) has been referred to as a "stand alone" proceeding. Corson v. Commissioner, supra 114 T.C. 354">114 T.C. 363; 114 T.C. 324">Fernandez v. Commissioner, supra at 329. In a stand-alone proceeding, the nonelecting spouse is statutorily entitled to "adequate notice" and "an opportunity to become a party" to the proceeding. Sec. 6015(e)(4); ⁴ Interim Rules 324 and 325; 114 T.C. 354">Corson v. Commissioner, supra.

2000 U.S. Tax Ct. LEXIS 52">*62 The issue we must decide for the first time is whether a spouse (or former spouse), who is not a petitioner, may intervene and become a party in a deficiency case where the other spouse (or former spouse) is a petitioner who is claiming relief from joint liability pursuant to section 6015. While we have not previously addressed this specific issue, we have previously allowed one spouse to challenge the other spouse's claim for relief under section 6015 where both spouses were before the Court as petitioners in the same deficiency case. See 114 T.C. 354">Corson v. Commissioner, supra.

114 T.C. 354">Corson v. Commissioner, supra, was a deficiency proceeding in which both spouses filed a joint petition with this Court pursuant to a notice of deficiency. In Corson, the taxpayers separated and divorced after their joint return was filed. The former wife filed an amended petition claiming relief from joint liability. Respondent separately negotiated settlements with the parties that included, for the former wife, relief from joint liability. The granting of this relief was not previously disclosed to her former husband. When the former husband became aware of this concession, he refused2000 U.S. Tax Ct. LEXIS 52">*63 to agree to the negotiated settlement, whereupon respondent filed a motion for entry of decision. In Corson, we noted that, in the context of a stand-alone proceeding under section 6015(e)(1)(A), the other spouse is entitled to notice and the opportunity to participate in the consideration of the claim for relief by the electing spouse at both the administrative level and in any subsequent judicial proceeding before this Court. See section 6015(e)(4), (g)(2). Even though Corson did not arise as a stand-alone proceeding, we held that, pursuant to section 6015, the husband was entitled to be heard on the question of his former wife's claim for relief from joint liability.

In the instant case, the claim for relief from joint liability arises, as in Corson, in the context of a deficiency proceeding. However, unlike Corson, in this case Mr. Freeman is not a petitioner in this deficiency proceeding. Mr. Freeman did not file a petition and, as a result, the deficiency was assessed against him. In our view, this difference is not a material distinction for purposes of deciding whether to allow Mr. Freeman to intervene. As we explained in Corson v. Commissioner, supra 114 T.C. 354">114 T.C. 365:

2000 U.S. Tax Ct. LEXIS 52">*64      Section 6015(e)(1) is structured so that administrative

   consideration (or failure to rule) will precede any court action

   when innocent spouse status is raised in a stand alone petition.

Section 6015(g)(2), in turn, contemplates an opportunity for the

   nonelecting spouse to participate at the administrative level.

   Section 6015(e)(4) then speaks of a similar chance for

115 T.C. 118">*124    participation should the matter move from an administrative to a

   judicial forum. Hence, as a general premise, we believe that

   these sections, when read together, reveal a concern on the part

   of the lawmakers with fairness to the nonelecting spouse and

   with providing him or her an opportunity to be heard on innocent

   spouse issues. Presumably, the purpose of affording to the

   nonelecting spouse an opportunity to be heard first in

   administrative proceedings and then in judicial proceedings is

   to ensure that innocent spouse relief is granted on the merits

   after taking into account all relevant evidence. After all,

   easing the standards for obtaining relief is not equivalent to

 2000 U.S. Tax Ct. LEXIS 52">*65   giving relief where unwarranted.

The same rationale applies in this case. Petitioner is seeking the same type of relief under section 6015 that would be the issue in any stand-alone case under section 6015(e)(1)(A). Congress believed that when a spouse (or former spouse) sought such relief, the other spouse (or former spouse) who signed the joint return should receive notice and an opportunity to intervene in order to challenge the propriety of granting such relief. In order to implement this objective, Congress directed this Court to establish rules. ⁵Congress also directed the Secretary to prescribe regulations. ⁶Therefore, we believe that it is necessary to provide a spouse (or former spouse) with both notice of, and an opportunity to be heard in, any case where the other spouse (or former spouse) is claiming relief from joint liability under section 6015. As we stated in Corson v. Commissioner, supra 114 T.C. 354">114 T.C. 364:

2000 U.S. Tax Ct. LEXIS 52">*66    Principally, we believe that the interests of justice would be

   ill served if the rights of the nonelecting spouse were to

   differ according to the procedural posture in which the issue of

   relief under section 6015 is brought before the Court. Identical

   issues before a single tribunal should receive similar

   treatment. * * *

Accordingly, we shall grant Mr. Freeman's motion and allow him to intervene in order to have an opportunity to challenge petitioner's claim for relief. The record in this case will be reopened, and the case will be calendared for further trial 115 T.C. 118">*125 solely with respect to petitioner's claim for relief from joint liability.

The Court has issued interim rules contained in Title XXXI of our Rules of Practice and Procedure that set forth procedures to be followed in stand-alone cases brought under section 6015(e)(1)(A). In deciding that Mr. Freeman may intervene in order to object to petitioner's claim for relief from joint liability, we are interpreting statutory provisions that require procedures which have not yet been completely provided for in our Rules. We believe that it is now necessary for us to articulate and announce2000 U.S. Tax Ct. LEXIS 52">*67 the necessary procedural requirements. ⁷

We hold that whenever, in the course of any proceeding before the Court, a taxpayer raises a claim for relief from joint liability under section 6015, and the other spouse (or former spouse) is not a party to the case, the Commissioner must serve notice of the claim on the other individual who filed the joint return for the year(s) in issue. The notice shall advise such other individual of his or her opportunity to file a notice of intervention for the sole purpose of challenging the petitioning individual's entitlement to relief from joint liability pursuant to section 6015. Such notice shall include a copy of Interim Rule 325. The Commissioner shall at the same time file with the Court a certification of such notice or, in a stand-alone case brought under section 6015(e)(1)(A), state in the answer that such notice has been provided. See Interim Rule 324(a)(2). Any intervention shall be made2000 U.S. Tax Ct. LEXIS 52">*68 in accordance with the provisions of Interim Rule 325(b).

These procedures are effective immediately and are applicable to all cases, including small tax cases.

An appropriate order will be issued.