The Mayor and City Council may amend rates when deemed necessary or advisable, and shall amend rates when necessary to comply with the provisions of Ordinance 1387. Prior to amending such rates, the Mayor and City Council shall hold a public hearing at which time all persons using water or owning premises on which water is used from the water system shall have an opportunity to be heard. Public notice of such hearing shall be given at least thirty (30) days prior to such hearing by publication of notice of intention to amend the water rates in one issue of the Coeur d'Alene Press at least thirty (30) days prior to such public hearing. (prior code §3-4-13)