a public hearing before taking action on a proposed amendment to the General Plan. If the Council proposes any modification to the amendment approved by the City Planning Commission, that proposed modification shall be referred to the City Planning Commission and the Mayor for their recommendations. The City Planning Commission and the Mayor shall review any modification made by the Council and shall make their recommendation on the modification to the Council in accordance with subsection (c) above. If no modifications are proposed by the Council, or after receipt of the Mayor’s and City Planning Commission’s recommendations on any proposed modification, or the expiration of their time to act, the Council shall adopt or reject the proposed amendment by resolution within the time specified by ordinance. (e) Votes Necessary for Adoption. If both the City Planning Commission and the Mayor recommend approval of a proposed amendment, the Council may adopt the amendment by a majority vote. If either the City Planning Commission or the Mayor recommends the disapproval of a proposed amendment, the Council may adopt the amendment only by a two-thirds vote. If both the City Planning Commission and the Mayor recommend the disapproval of a proposed amendment, the Council may adopt the amendment only by a three-fourths vote. If the Council proposes a modification of an amendment, the recommendations of the Commission and the Mayor on the modification shall affect only that modification.