(a) Except as provided in subsections (b) and (c) and in section 501A.05, subsection (a) , the time of creation of a nonvested property interest or a power of appointment is determined under general principles of property law.
(b) For purposes of sections 501A.01 to 501A.07 , if there is a person who alone can exercise a power created by a governing instrument to become the unqualified beneficial owner of (i) a nonvested property interest or (ii) a property interest subject to a power of appointment described in section 501A.01, subsection (b ) or (c), the nonvested property interest or power of appointment is created when the power to become the unqualified beneficial owner terminates.
(c) For purposes of sections 501A.01 to 501A.07 , a nonvested property interest or a power of appointment arising from a transfer of property to a previously funded trust or other existing property arrangement is created when the nonvested property interest or power of appointment in the original contribution was created.