The governing body of the city creating the district shall have sole discretion as to how the revenue derived from any tax to be imposed herein, or any revenue derived from disposition of assets of the district, shall be used within the scope of the above purposes. The governing body of the city shall appoint an advisory board or commission to make recommendations as to its use. The governing body of the city creating the district shall not decrease the level of publicly funded services in the district existing prior to creation of the district or transfer the financial burden of providing the services to the district unless the services at the same time are decreased throughout the city, nor shall the governing body discriminate in the provision of the publicly funded services between areas included in such a district and areas not so included.