Cal. Gov. Code § 6519
Notwithstanding any other provision of law, the State of California does hereby pledge to, and agree with, the holders of bonds issued by any agency or entity created by a joint exercise of powers agreement by and among two or more cities, counties, or cities and counties, that the state will not change the composition of the issuing agency or entity unless such change in composition is authorized by a majority vote of the legislative body of each such city, county, or city and county, or by a majority vote of the qualified electors of each such city, county, or city and county.
"Change in composition," as used in this section, means the addition of any public agency or person to any agency or entity created by a joint exercise of powers agreement pursuant to this chapter, the deletion of any public agency from any such joint powers agency or entity, or the addition to, or deletion from, the governing body of any such joint powers agency, or entity of any public official of any member public agency or other public agency, or any other person.
Ca. Gov. Code § 6519