A compact entered into pursuant to the authority conferred by *RCW 74.13.152 through 74.13.159 may contain provisions in addition to those required under **RCW 74.13.156, as follows:
(1) Provisions establishing procedures and entitlement to medical and other necessary social services for the child in accordance with applicable laws, even though the child and the adoptive parents are in a state other than the one responsible for or providing the services or the funds to defray part or all of the costs of the services; and
(2) Such other provisions as are appropriate or incidental to the proper administration of the compact.