Section 54Local Government Code of 1991 (Republic Act No. 7160), Sec. 54

Approval of Ordinances. -

(a) Every ordinance enacted by the sangguniang panlalawigan, sangguniang panlungsod, or sangguniang bayan shall be presented to the provincial governor or city or municipal mayor, as the case may be. If the local chief executive concerned approves the same, he shall affix his signature on each and every page thereof; otherwise, he shall veto it and return the same with his objections to the sanggunian, which may proceed to reconsider the same. The sanggunian concerned may override the veto of the local chief executive by two-thirds (2/3) vote of all its members, thereby making the ordinance or resolution effective for all legal intents and purposes.

(b) The veto shall be communicated by the local chief executive concerned to the sanggunian within fifteen (15) days in the case of a province, and ten (10) days in the case of a city or a municipality; otherwise, the ordinance shall be deemed approved as if he had signed it.

(c) Ordinances enacted by the sangguniang barangay shall, upon approval by the majority of all its members, be signed by the punong barangay.