California Code, Government Code - GOV § 66458

(a) The legislative body shall, at the meeting at which it receives the map or, at its next regular meeting after the meeting at which it receives the map, approve the map if it conforms to all the requirements of this chapter and any local subdivision ordinance applicable at the time of approval or conditional approval of the tentative map and any rulings made thereunder.  If the map does not conform, the legislative body shall disapprove the map.

(b) If the legislative body does not approve or disapprove the map within the prescribed time, or any authorized extension thereof, and the map conforms to all requirements and rulings, it shall be deemed approved, and the clerk of the legislative body shall certify or state its approval thereon.

(c) The meeting at which the legislative body receives the map shall be the date on which the clerk of the legislative body receives the map.

(d) The legislative body may provide, by ordinance, for the approval or disapproval of final maps by the city or county engineer, surveyor, or other designated official.  The legislative body may also provide, by ordinance, that the official may accept, accept subject to improvement, or reject dedications and offers of dedications that are made by a statement on the map.  Any ordinance adopted pursuant to this subdivision shall provide that (1) the designated official shall notify the legislative body at its next regular meeting after the official receives the map that the official is reviewing the map for final approval, (2) the designated official shall approve or disapprove the final map within 10 days following the meeting of the legislative body that was preceded by the notice in (4) below, (3) the designated official's action may be appealed to the legislative body, (4) the clerk of the legislative body shall provide notice of any pending approval or disapproval by a designated official, which notice shall be attached and posted with the legislative body's regular agenda and shall be mailed to interested parties who request notice, and (5) the legislative body shall periodically review the delegation of authority to the designated official.  Except as specifically authorized by this subdivision, the processing of final maps shall conform to all procedural requirements of this division.