Cal. Ed. Code § 10905
The governing body of any public authority may cooperate with the federal government or any department thereof, and the governing bodies of any two or more public authorities may cooperate with each other or with the federal government or any department thereof to carry out the purposes of this chapter, and to that end may enter into agreements with each other, and may do any and all things necessary or convenient to aid and cooperate in carrying out the purposes of this chapter, or to establish, improve or maintain campgrounds or other recreation facilities under the control of the federal government or any department thereof.
The governing bodies of any two or more public authorities having jurisdiction over any of the same territory or over contiguous territories may jointly establish a system or systems of recreation, and may jointly do any act which either is authorized to do under Section 10903. Nothing in this chapter shall be construed to prohibit any joint or cooperative action authorized by this section.
Ca. Educ. Code § 10905