§ 20.6163-1. Extension of time for payment of estate tax on value of reversionary or remainder interest in property.

¶(b) Notice of the exercise of the election to postpone the payment of the tax attributable to a reversionary or remainder interest should be filed with the district director before the date prescribed for payment of the tax. The notice of election may be made in the form of a letter addressed to the district director. There shall be filed with the notice of election a certified copy of the will or other instrument under which the reversionary or remainder interest, was created, or a copy verified by the executor if the instrument is not filed of record. The district director may require the submission of such additional proof as he deems necessary to disclose the complete facts. If the duration of the precedent interest is dependent upon the life of any person, the notice of election must show the date of birth of that person.

¶(c) If the decedent's gross estate consists of both a reversionary or remainder interest in property and other property, the tax attributable to the reversionary or remainder interest, within the meaning of this section, is an amount which bears the same ratio to the total tax as the value of the reversionary or remainder interest (reduced as provided in the following sentence) bears to the entire gross estate (reduced as provided in the last sentence of this paragraph). In applying this ratio, the value of the reversionary or remainder interest is reduced by (1) the amount of claims, mortgages, and indebtedness which is a lien upon such interest; (2) losses in respect of such interest during the settlement of the estate which are deductible under the provisions of section 2054 or section 2106(a)(1); (3) any amount deductible in respect of such interest under section 2055 or 2106(a)(2) for charitable, etc., transfers; and (4) the portion of the marital deduction allowed under the provisions of section 2056 on account of bequests, etc., of such interests to the decedent's surviving spouse. Likewise, in applying the ratio, the value of the gross estate is reduced by such deductions having similar relationship to the items comprising the gross estate.

¶(d) For provisions requiring the payment of interest during the period of the extension occurring before July 1, 1975, see section 6601(b) prior to its amendment by section 7(d)(1) of the Act of Jan. 3, 1975 (Pub. L. 93-625, 88 Stat. 2115). For provisions requiring the furnishing of security for the payment of the tax for which the extension is granted, see paragraph (b) of § 20.6165-1. For provisions concerning the time within which credit for State and foreign death taxes on such a reversionary or remainder interest may be taken, see section 2015 and the regulations thereunder.