Except as provided in Sections 21211 and 21212, the time of creation of a nonvested property interest or a power of appointment is determined by other applicable statutes or, if none, under general principles of property law.

For purposes of this chapter:

For purposes of this chapter, 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.