Disclaimer by a surviving spouse. If an interest in property passes to a decedent's surviving spouse in a taxable transfer made by a decedent dying before January 1, 1977, and the decedent's surviving spouse makes a disclaimer of this property interest the disclaimed interest is considered as passing from the decedent to the person or persons entitled to receive the interest as a result of the disclaimer. A disclaimer is a complete and unqualified refusal to accept the rights to which one is entitled. It is, therefore, necessary to distinguish between the surviving spouse's disclaimer of a property interest and such surviving spouse's acceptance and subsequent disposal of a property interest. For example, if proceeds of insurance are payable to the surviving spouse and the proceeds are refused so that they consequently pass to an alternate beneficiary designated by the decedent, the proceeds are considered as having passed from the decedent to the alternate beneficiary. On the other hand, if the insurance company is directed by the surviving spouse to hold the proceeds at interest during such spouse's life and, upon this spouse's death, to pay the principal sum to another person designated by the surviving spouse, thus effecting a transfer of a remainder interest, the proceeds are considered as having passed from the decedent to the surviving spouse. See paragraph (c) of § 20.2056(e)-2 with respect to a spouse's exercise or failure to exercise a right to take against a decedent's will.

Disclaimer by a person other than a surviving spouse—(1) Decedents dying after October 3, 1966 and before January 1, 1977. This paragraph (b)(1) applies in the case of a disclaimer of property passing to one other than the surviving spouse from a decedent dying after October 3, 1966 and before January 1, 1977. If a surviving spouse is entitled to receive property from the decedent as a result of the timely disclaimer made by the disclaimant, the property received by the surviving spouse is to be treated as passing to the surviving spouse from the decedent. Both a disclaimer of property passing by the laws of intestacy or otherwise, as by insurance or by trust, and a disclaimer of bequests and devises under the will of a decedent are to be fully effective for purposes of computing the marital deduction under section 2056. A disclaimer is a complete and unqualified refusal to accept some or all of the rights to which one is entitled. It must be a valid refusal under State law and must be made without consideration. For example, a disclaimer for the benefit of a surviving spouse who promises to give or bequeath property to a child of the person who disclaims is not a disclaimer within the meaning of this paragraph (b)(1). The disclaimer must be made before the person disclaiming accepts any property under the disclaimed interest. In the case of property transferred by a decedent dying after December 31, 1970, and before January 1, 1977, the disclaimer must be made within 9 months after the decedent's death (or within any extension of time for filing the estate tax return granted pursuant to section 6081). In the case of property transferred by a decedent dying after October 3, 1966, and before January 1, 1971, the disclaimer must be made within 15 months after the decedent's death (or within any extension of time for filing the estate tax return granted pursuant to section 6081). If the disclaimer does not satisfy the requirements of this paragraph (b)(1), for the purpose of the marital deduction, the property is considered as passing from the decedent to the person who made the disclaimer as if the disclaimer had not been made.

Decedents dying after September 30, 1963 and before October 4, 1966. This paragraph (b)(2) applies in the case of a disclaimer of property passing to one other than the surviving spouse from a decedent dying after September 30, 1963 and before October 4, 1966. If, as a result of the disclaimer by the disclaimant, the surviving spouse is entitled to receive the disclaimed property interest, then such interest shall, for the purposes of this paragraph (b)(2), be considered as passing from the decedent to the surviving spouse if the following conditions are met. First, the interest disclaimed was bequeathed or devised to the disclaimant. Second, the disclaimant disclaimed all bequests and devises under the will before the date prescribed for the filing of the estate tax return. Third, the disclaimant did not accept any property under the bequest or devise before making the disclaimer.

Decedents dying before October 4, 1966. Unless the rule of paragraph (b)(2) of this section applies, this paragraph (b)(3) applies in the case of a disclaimer of property passing to one other than the surviving spouse from a decedent dying before October 4, 1966. For the purpose of these transfers, it is unnecessary to distinguish for the purpose of the marital deduction between a disclaimer by a person other than the surviving spouse and a transfer by such person. If the surviving spouse becomes entitled to receive an interest in property from the decedent as a result of a disclaimer made by some other person, the interest is, nevertheless, considered as having passed from the decedent, not to the surviving spouse, but to the person who made the disclaimer, as though the disclaimer had not been made. If, as a result of a disclaimer made by a person other than the surviving spouse, a property interest passes to the surviving spouse under circumstances which meet the conditions set forth in § 20.2056(b)-5 (relating to a life estate with a power of appointment), the rule stated in the preceding sentence applies, not only with respect to the portion of the interest which beneficially vests in the surviving spouse, but also with respect to the portion over which such spouse acquires a power to appoint. The rule applies also in the case of proceeds under a life insurance, endowment, or annuity contract which, as a result of a disclaimer made by a person other than the surviving spouse, are held by the insurer subject to the conditions set forth in § 20.2056(b)-6.