Except the following are not general powers of appointment:
- A power to consume, invade, or appropriate property for the benefit of the decedent that is limited by an ascertainable standard relating to the health, education, support, or maintenance of the decedent. 26 U.S.C. § 2041(b)(1)(A).
- A power exercisable by the decedent only in conjunction with the creator of the power. 26 U.S.C. § 2041(b)(1)(C)(i).
- Except on the flip side, it is then includable in the creator's estate tax if he predeceases under 26 U.S.C. § 2038. (And § 2036 could also apply.)
- A power exercisable by the decedent only in conjunction with a person having a substantial interest in the property subject to the power, which is adverse to the exercise of the power in favor of the decedent. 26 U.S.C. § 2041(b)(1)(C)(ii).
Substantial Adverse Interest
A substantial adverse interest is one where one has a not insignificant proportion of the power "after the decedent's death and may exercise it at that time in favor of himself, his estate, his creditors, or the creditors of his estate." 26 CFR § 20.2041-3(c)(2).
If one's interest does not pass on death to his fellow joint donees, they do not have substantial adverse interests. 26 CFR § 20.2041-3(c)(3).