26 CFR § 1.761-1 - Terms defined.
(c) Partnership agreement. For the purposes of subchapter K, a partnership agreement includes the original agreement and any modifications thereof agreed to by all the partners or adopted in any other manner provided by the partnership agreement. Such agreement or modifications can be oral or written. A partnership agreement may be modified with respect to a particular taxable year subsequent to the close of such taxable year, but not later than the date (not including any extension of time) prescribed by law for the filing of the partnership return. As to any matter on which the partnership agreement, or any modification thereof, is silent, the provisions of local law shall be considered to constitute a part of the agreement.
(d) Liquidation of partner's interest. The term liquidation of a partner's interest means the termination of a partner's entire interest in a partnership by means of a distribution, or a series of distributions, to the partner by the partnership. A series of distributions will come within the meaning of this term whether they are made in one year or in more than one year. Where a partner's interest is to be liquidated by a series of distributions, the interest will not be considered as liquidated until the final distribution has been made. For the basis of property distributed in one liquidating distribution, or in a series of distributions in liquidation, see section 732(b). A distribution which is not in liquidation of a partner's entire interest, as defined in this paragraph, is a current distribution. Current distributions, therefore, include distributions in partial liquidation of a partner's interest, and distributions of the partner's distributive share. See paragraph (a)(1)(ii) of § 1.731-1.
(e) Distribution of partnership interest. For purposes of section 708(b)(1)(B) and § 1.708-1(b)(1)(iv), the deemed distribution of an interest in a new partnership by a partnership that terminates under section 708(b)(1)(B) is not a sale or exchange of an interest in the new partnership. However, the deemed distribution of an interest in a new partnership by a partnership that terminates under section 708(b)(1)(B) is treated as an exchange of the interest in the new partnership for purposes of section 743. This paragraph (e) applies to terminations of partnerships under section 708(b)(1)(B) occurring on or after May 9, 1997; however, this paragraph (e) may be applied to terminations occurring on or after May 9, 1996, provided that the partnership and its partners apply this paragraph (e) to the termination in a consistent manner.