The Mayor and City Council of Baltimore City shall refer proposed changes to the boundaries of a district or zone to the Baltimore City Planning Commission and to the Board. The Planning Commission and the Board shall: study the proposed changes in relation to: the plan; the needs of Baltimore City; and the needs of the particular neighborhood in the vicinity of the proposed changes; and report their findings and recommendations to the Mayor and City Council. If the Planning Commission and the Board recommend disapproval of the proposed changes to the boundaries of a district or zone, the changes may not take effect unless a majority of the members of the City Council vote to approve the changes. The provisions of § 10–303 of this subtitle concerning public hearings and notice apply to all changes or amendments to regulations and boundaries.