Power of appointment; compliance with specific reference

requirement. A powerholder's substantial compliance with a formal requirement of appointment imposed in a governing instrument by the donor, including a requirement that the instrument exercising the power of appointment make reference or specific reference to the power, is sufficient if: A. the powerholder knows of and intends to exercise the power; and B. the powerholder's manner of attempted exercise does not impair a material purpose of the donor in imposing the requirement.