California Code, Civil Code - CIV § 3273.2

(a) The provisions of this title apply to a mortgage or deed of trust that is secured by residential property containing no more than four dwelling units, including individual units of condominiums or cooperatives, and that was outstanding as of the enactment date of this title.

(b) The provisions of this title shall apply to a depository institution chartered under federal or state law, a person covered by the licensing requirements of Division 9 (commencing with Section 22000) or Division 20 (commencing with Section 50000) of the Financial Code, or a person licensed pursuant to Part 1 (commencing with Section 10000) of Division 4 of the Business and Professions Code.