The regulations and the number, area, and boundaries of the districts established by this ordinance may be amended, supplemented, changed, modified or repealed by the municipal governing body; but no amendment shall become effective unless it is first submitted to the municipal planning commission for its recommendation. The municipal planning commission, upon its own initiative, may hold public hearings, public notice of which shall be given, for the consideration of any proposed amendment to the provisions of this ordinance or to the zoning map and report its recommendation to the municipal governing body. The provisions of sections 11-52-76 and 11-52-77, Code of Alabama, 1975 [Code of Ala. 1975, §§ 11-52-76, 11-52-77], as the same may be amended, shall apply to all changes and amendments.