Any number of ordinances may be voted on at the same election in accordance with the provisions of this Article. If a majority of the legal. votes cast is in favor of an initiated ordinance, it shall thereupon be effective as an ordinance of the City. An ordinance thus adopted may be repealed or amended at any time after the expiration of one year by a vote of two-thirds of the City Council members qualified and serving. A referred ordinance which is rejected by a majority of the legal votes cast in a referendum election shall be deemed thereupon repealed. An ordinance thus rejected may be reenacted at any time after the expiration of one year by a vote of two-thirds of the City Council members qualified and serving.