No ordinance which has been passed by the Council upon a petition or adopted by popular vote, under the provisions of this article, shall be repealed or amended by the Council within a period of two years following such enactment: Provided, that such ordinance may be amended within two years after such ordinance by a vote of a majority plus one of the Council. But such ordinance may be amended or repealed at any general or special election by direct vote of the people. (Ord. 2924-06 § 15, 2006)