California Code, Business and Professions Code - BPC § 10244.1

Notwithstanding the provisions of Section 10244, on a loan secured directly or collaterally by a lien on real property comprising an owner-occupied dwelling, for a term of six years or less, no installment, whether providing for payment of principal and interest or interest only, shall be greater than twice the amount of the smallest installment. This section does not apply to a note given back to the seller by the purchaser on account for the purchase price or any collateral loans secured solely by such a note. As used in this section, “owner-occupied dwelling” means a single dwelling unit in a condominium or cooperative or a residential building of less than three separate dwelling units, one of which will be owned and occupied by a signatory to the mortgage or deed of trust secured by such dwelling within 90 days of the execution of the mortgage or deed of trust.