The rules, regulations, rates, charges and other provisions of this chapter pertaining to sanitary sewer service in the City and within the City zoning jurisdiction shall be considered a part of the contract between the City and every person supplied with sanitary sewer service through the sanitary sewer system of the City. All rates, charges, or fees pertaining to sanitary sewer service within the City and the City’s zoning jurisdiction shall be set by resolution as adopted by the City Council in a manner prescribed by law.