Cal. Welf. & Inst. Code § 16173

The State Department of Social Services and the State Department of Health Services are authorized to develop, participate in the development of, negotiate, or enter into one or more interstate compacts on behalf of this state with other states to implement one or more of the purposes set forth in this chapter. When entered into, and for so long as it shall remain in force, a compact shall have the force and effect of law.