California Code, Code of Civil Procedure - CCP § 704.965

If a homestead declaration is recorded prior to the operative date of an amendment to Section 704.730 which increases the amount of the homestead exemption, the amount of the exemption for the purposes of subdivision (c) of Section 704.950 and Section 704.960 is the increased amount, except that, if the judgment creditor obtained a lien on the declared homestead prior to the operative date of the amendment to Section 704.730, the exemption for the purposes of subdivision (c) of Section 704.950 and Section 704.960 shall be determined as if that amendment to Section 704.730 had not been enacted.