Health and Safety Code § 52022

Notwithstanding Section 711 of the Civil Code, any indebtedness incurred pursuant to a mortgage financed under the terms of this part shall be subject to acceleration and the balance owing declared immediately due and payable upon the sale of the home to a purchaser who does not meet the required qualifications for borrowers of subdivision (f) of Section 52020 or any more stringent qualifications as the city or county may require.