A compact administrator may make supplementary agreements with appropriate officials of other states pursuant to the compact. If a supplementary agreement requires or contemplates the use of an institution or facility of this state or requires or contemplates the provision of a service of this state, the supplementary agreement has no force or effect until approved by the head of the department or agency under whose jurisdiction the institution is operated, or whose department or agency is charged with performing the service.
Tex. Fam. Code § 60.006