California Code, Government Code - GOV § 66472.1

In addition to the amendments authorized by Section 66469, after a final map or parcel map is filed in the office of the county recorder, the recorded final map may be modified by a certificate of correction or an amending map, if authorized by local ordinance, if the local agency finds that there are changes in circumstances that make any or all of the conditions of the map no longer appropriate or necessary and that the modifications do not impose any additional burden on the fee owners of the real property, and if the modifications do not alter any right, title, or interest in the real property reflected on the recorded map, and the local agency finds that the map as modified conforms to Section 66474.  Any modification shall be set for public hearing as provided for in Section 66451.3.  The local agency shall confine the hearing to consideration of, and action on, the proposed modification.