26 C.F.R. § 18.1371-1
A corporation may make an election under section 1371(e) (as amended by section 721(o) of the Act) to treat all distributions of money made during the post-termination transition period described in section 1377(b)(1)(A) as coming out of the corporation's earnings and profits (after earnings and profits have been eliminated, the distributions are applied against and reduce the adjusted basis of the stock). The election may be made only with the consent of each shareholder to whom the corporation makes a distribution (whether or not it is a cash distribution) during such post-termination transition period. Any such election shall be made by the corporation by attaching to its income tax return for the C year in which such post-termination transition period ends a statement which clearly indicates that the corporation elects to have section 1371(e)(1) not apply to all distributions made during such post-termination transition period. The election shall not be effective unless such statement is signed by a person authorized to sign the return required to be filed under section 6012 and by each shareholder required to consent to the election.
26 C.F.R. §18.1371-1