Taxpayer argues that the IRS had six years under § 6502(a)(1)—a period that expired before the 1990 amendments or the IRS’s levy—or the extended period, to December 31, 1990, contained in the agreement between taxpayer and the IRS under § 6502(a)(2) in which to collect the assessment. The extension agreement was a contract increasing the permissible period for levy or suit to December 31, 1990; that date became the substitute limitations period under the contract, authorized by I.R.C. § 6502(a)(2). She relies upon the “or” in § 6502 for her assertion that the two provisions, § 6502(a)(1) and (a)(2), are mutually exclusive. Taxpayer cites United States v. Newman, 405 F.2d 189 (5th Cir.1968), which stated
The word “or” in [what is now § 6502(a) ] is not a fertile word which is subject to varied constructions. The use of “or” in the statute means that Congress intended that limitations should be determined either by reference to a six-year period, or alternatively by reference to a measure established by agreement between the taxpayer and the government—in the case at bar, the time established in the waiver agreement. Thus when the alternative measure was established by the waiver agreement, the six-year statutory limitation period became functus officio and ceased to have any relevance in the determination of the timeliness of the government’s action. The district court, therefore, erred when it looked to the six-year limitation period after that period had become functus officio as a result of the waiver agreement.
Id. at 197-98. See also Knutzen v. Eben Ezer Lutheran Housing Center, 815 F.2d 1343, 1349 (10th Cir.1987) (holding that generally “or” is a disjunctive that indicates Congress intended exclusive alternatives, unless the context or congressional intent intends otherwise).
The 1990 amendments can be read as consistent with this view. The amendments apply to “taxes assessed on or before [November 5, 1990] if the period specified in § 6502 ... has not expired as of such date.” Pub.L. No. 101-508, § 11317(c)(2) (emphasis added). The only period “specified in § 6502” is the six years referenced in both (a) subsections, which had expired before that date. The December 31, 1990 extended period is not specified in § 6502, it is only specified in a written agreement with the government signed pursuant to § 6502(a)(2). This is essentially the analysis District Judge Benson found convincing in another Utah case. See United States v. Simons, 864 F.Supp. 171, 173 (D.Utah 1994) (citing Neuman).
Both arguments have appeal, from which we conclude that the issue cannot be determined simply from looking at the words of the “effective date” clause of the 1990 amendments. ■ This is not a case of deferring to the agency’s interpretation under the principles announced in Chevron, U.S.A. Inc. v. Natural Resources Defense Council, Inc., 467 U.S. 837, 104 S.Ct. 2778, 81 L.Ed.2d 694 (1984). The IRS has a litigating position, but no interpretation embodied in a Treasury Regulation or even a Revenue Ruling. Nevertheless, we hold that the statute of limitations was extended by the amendments as applied to the instant case, for the following reasons.
First, the two § 6502 subsections (a)(1) and (a)(2), in context, do not seem to state mutually exclusive alternatives. The limitations period of subsection (a)(1) does not commence to run until the IRS issues a deficiency assessment against a taxpayer. Subsection (a)(2) on its face permits the taxpayer—by extending the limitations period— to purchase more negotiating time to settle contested tax deficiencies, to come up with documentation to convince the IRS the assessment was wrong, or to secure the money to pay taxes admittedly due.
Second, to accept taxpayer’s argument we must consider the extension agreement to be a contract. Certainly contract principles would govern aspects of such agreements, but the Supreme Court in analogous cases has clearly stated that such waivers are not contracts. Florsheim Bros. Drygoods Co. v. United States, 280 U.S. 453, 466, 50 S.Ct. 215, 219, 74 L.Ed. 542 (1930). Summarizing Florsheim’s holding, Stange v. United States, 282 U.S. 270, 276, 51 S.Ct. 145, 147, 75 L.Ed. 335 (1931), stated: “As