(1) A regulation may specify a law of a State that substantially corresponds to the provisions in Part 2.3 that relate to a protection order to be a child welfare law.
(2) A regulation may specify a law of a State that substantially corresponds to the provisions in this Part to be an interstate law.
(3) A regulation may specify an office or position in a State to be an office or position the holder or occupier of which is the interstate officer of the State.