As used in this Act, unless the context clearly indicates otherwise:
"Adoption assistance state" means the state that is signatory to an adoption assistance agreement in a particular case.
"Residence state" means the state where the child is living.
"State" means a state of the United States, the District of Columbia, the Commonwealth of Puerto Rico, the Virgin Islands, Guam, the Commonwealth of the Northern Mariana Islands, or a Territory or Possession of or administered by the United States.
45 ILCS 17/5-15