Example (1). A decedent in 1951 exercised a general power of appointment created in 1940, reserving no interest in or power over the property subject to the general power. The decedent died in 1956. Since the exercise was not made within three years before the decedent's death, no part of the property is includable in his gross estate. See section 2035(b), relating to transfers in contemplation of death.
Example (2). S created a trust in 1930 to pay the income to A for life, remainder as B appoints by an instrument filed with the trustee during B's lifetime, and in default of appointment remainder to C. B exercised the power in 1955 by directing that after A's death the income be paid to himself for life with remainder to C. If B dies after A, the entire value of the trust property would be included in B's gross estate, since such a disposition if it were a transfer of property owned by B would cause the property to be included in his gross estate under section 2036(a)(1). If B dies before A, the value of the trust property less the value of A's life estate would be included in B's gross estate for the same reason.
Example (3). S created a trust in 1940 to pay the income to A for life, remainder as A appoints by an instrument filed with the trustee during A's lifetime. A exercised the trustee during A's lifetime. A exercised the power in 1955, five years before his death, reserving the right of revocation. The exercise, if not revoked before death, will cause the property subject to the power to be included in A's gross estate under section 2041(a)(1), since such a disposition if it were a transfer of property owned by A would cause the property to be included in his gross estate under section 2038. However, if the exercise were completely revoked, so that A died still possessed of the power, the property would not be included in A's gross estate for the reason that the power will not be treated as having been exercised.
Example (4). A decedent exercised a general power of appointment created in 1940 by making a disposition in trust under which possession or enjoyment of the property subject to the exercise could be obtained only by surviving the decedent and under which the decedent retained a reversionary interest in the property of a value of more than five percent. The exercise will cause the property subject to the power to be included in the decedent's gross estate, since such a disposition if it were a transfer of property owned by the decedent would cause the property to be included in his gross estate under section 2037.
However, if a general power created on or before October 21, 1942, is partially released on or after the later of these dates, a subsequent exercise of the power will cause the property subject to the power to be included in the holder's gross estate, if the exercise is such that if it were a disposition of property owned by the decedent it would cause the property to be included in his gross estate. The legal disability referred to in this paragraph is determined under local law and may include the disability of an insane person, a minor, or an unborn child. The fact that the type of general power of appointment possessed by the decedent actually was not generally releasable under the local law does not place the decedent under a legal disability within the meaning of this paragraph. In general, however, it is assumed that all general powers of appointment are releasable, unless the local law on the subject is to the contrary, and it is presumed that the method employed to release the power is effective, unless it is not in accordance with the local law relating specifically to releases or, in the absence of such local law, is not in accordance with the local law relating to similar transactions.
26 C.F.R. §20.2041-2