California Code
ARTICLE 2a - Formation of Districts in Two or More Municipal Corporations and Also in Unincorporated Territory
Section 4614.15.

4614.15. This chapter does not prevent two or more cities or the board of supervisors of any county from entering into co-operation agreements for the joint acquisition, construction, or use of joint sanitary sewage facilities, flood control works, and storm water drainage systems.

(Amended by Stats. 1963, Ch. 756.)