Cal. Gov't Code § 65968
(b)
(1) Except as permitted pursuant to paragraph (2), the endowment shall be held by one of the following:
(2) The exceptions to paragraph (1) are the following:
(e) The holder of an endowment shall certify to the project proponent or the holder of the mitigation property or a conservation easement and the local or state agency that required the endowment that it meets all of the following requirements:
(3) The holder utilizes generally accepted accounting practices as promulgated by either of the following:
(g) Except for a mitigation agreement prepared by a state agency, the mitigation agreement that authorizes the funds to be conveyed to a governmental entity, community foundation, special district, a congressionally chartered foundation, or nonprofit organization pursuant to subdivision (a) shall include a provision that requires the endowment be held by a governmental entity, special district, or a nonprofit organization to revert to the local agency, or to a successor organization identified by the agency and subject to subdivision (e), if any of the following occurs: