(1) “Child” means a person who, by reason of minority, is legally subject to parental, guardianship or similar control.

(2) “Sending agency” means a party state, officer or employee thereof; a subdivision of a party state, or officer or employee thereof; a court of a party state; a person, corporation, association, charitable agency or other entity which sends, brings, or causes to be sent or brought any child to another party state.

(3) “Receiving state” means the state to which a child is sent, brought, or caused to be sent or brought, whether by public authorities or private persons or agencies, and whether for placement with state or local public authorities or for placement with private agencies or persons.

(4) “Placement” means the arrangement for the care of a child in a family free or boarding home or in a child-caring agency or institution but does not include any institution caring for the mentally ill, mentally defective or epileptic or any institution primarily educational in character, and any hospital or other medical facility.