§ 751.
(c)
Unrealized receivables
For purposes of this subchapter, the term “unrealized receivables” includes, to the extent not previously includible in income under the method of accounting used by the partnership, any rights (contractual or otherwise) to payment for—
(1)
goods delivered, or to be delivered, to the extent the proceeds therefrom would be treated as amounts received from the sale or exchange of property other than a capital asset, or
(2)
services rendered, or to be rendered.
For purposes of this section and sections 731, 732, and 741 (but not for purposes of section 736), such term also includes mining property (as defined in section 617(f)(2)), stock in a DISC (as described in section 992(a)), section 1245 property (as defined in section 1245(a)(3)), stock in certain foreign corporations (as described in section 1248), section 1250 property (as defined in section 1250(c)), farm land (as defined in section 1252(a)), franchises, trademarks, or trade names (referred to in section 1253(a)), and an oil, gas, or geothermal property (described in section 1254) but only to the extent of the amount which would be treated as gain to which section 617(d)(1), 995(c), 1245(a), 1248(a), 1250(a), 1252(a), 1253(a), or 1254(a) would apply if (at the time of the transaction described in this section or section 731, 732, or 741, as the case may be) such property had been sold by the partnership at its fair market value. For purposes of this section and sections 731, 732, and 741 (but not for purposes of section 736), such term also includes any market discount bond (as defined in section 1278) and any short-term obligation (as defined in section 1283) but only to the extent of the amount which would be treated as ordinary income if (at the time of the transaction described in this section or section 731, 732, or 741, as the case may be) such property had been sold by the partnership.
([Aug. 16, 1954, ch. 736], [68A Stat. 250]; [Pub. L. 87–834], §§ 13(f)(1), 14(b)(2), Oct. 16, 1962, [76 Stat. 1035], 1041; [Pub. L. 88–272, title II, § 231(b)(6)], Feb. 26, 1964, [78 Stat. 105]; [Pub. L. 89–570, § 1(c)], Sept. 12, 1966, [80 Stat. 762]; [Pub. L. 91–172, title II, § 211(b)(6)], Dec. 30, 1969, [83 Stat. 570]; [Pub. L. 94–455, title II, § 205(b)], title X, § 1042(c)(2), title XI, § 1101(d)(2), title XIX, §§ 1901(a)(93), 1906(b)(13)(A), title XXI, § 2110(a), Oct. 4, 1976, [90 Stat. 1535], 1637, 1658, 1780, 1834, 1905; [Pub. L. 95–600, title VII, § 701(u)(13)(A)], Nov. 6, 1978, [92 Stat. 2918]; [Pub. L. 95–618, title IV, § 402(c)(5)], Nov. 9, 1978, [92 Stat. 3202]; [Pub. L. 97–448, title I, § 102(a)(6)], Jan. 12, 1983, [96 Stat. 2368]; [Pub. L. 98–369, div. A, title I], §§ 43(c)(3), 76(a), title IV, § 492(b)(4), July 18, 1984, [98 Stat. 558], 595, 854; [Pub. L. 99–514, title II, § 201(d)(10)], title XVIII, § 1899A(19), Oct. 22, 1986, [100 Stat. 2141], 2959; [Pub. L. 103–66, title XIII], §§ 13206(e)(1), 13262(b)(1), (2)(A), Aug. 10, 1993, [107 Stat. 467], 541; [Pub. L. 105–34, title X, § 1062(a)]–(b)(2), Aug. 5, 1997, [111 Stat. 946], 947; [Pub. L. 105–206, title VI, § 6010(m)], July 22, 1998, [112 Stat. 816]; [Pub. L. 106–170, title V, § 532(c)(2)(F)], Dec. 17, 1999, [113 Stat. 1930]; [Pub. L. 108–357, title IV, § 413(c)(11)], Oct. 22, 2004, [118 Stat. 1507]; [Pub. L. 115–141, div. U, title IV, § 401(a)(140)], Mar. 23, 2018, [132 Stat. 1191].)