Cal. Civ. Code § 2924.20

Consistent with their general regulatory authority, and notwithstanding subdivisions (b) and (c) of Section 2924.18, the Department of Financial Protection and Innovation and the Bureau of Real Estate may adopt regulations applicable to any entity or person under their respective jurisdictions that are necessary to carry out the purposes of the act that added this section. A violation of the regulations adopted pursuant to this section shall only be enforceable by the regulatory agency.