All ordinances, resolutions, rules, and, regulations in force in the City as of the effective date of this Charter, and not in conflict with this Charter, shall remain in force until amended or repealed by the City Council. All taxes, assessments, liens, encumbrances, and demands of or against the City, fixed or established before such date, or for the fixing or establishing of which proceedings have begun before such date, shall be valid when properly fixed or established either under the ordinances, resolutions, rules and regulations in force at the time of the beginning of such proceedings or in force after the adoption of this Charter.