Nothing herein contained shall be construed to give or grant to the Zoning Board of Appeals the power or authority to alter or change the zoning chapter or any use district made a part of the zoning chapter; such power and authority being reserved to the Council, and the Board shall not have any power or authority with respect to any alterations or change of the zoning chapter except to make recommendations to the City Council in such specific cases as may properly come before the Zoning Board of Appeals.
('71 Code, § 2-12-6)