A municipality may finance the cost of an electric utility facility, or its share of the cost of an electric utility facility acquired jointly pursuant to article 2 or article 3 or other law, by any lawful means available to the municipality, including the issuance of general obligation bonds pursuant to charter authority, the issuance of revenue bonds pursuant to Act No. 94 of the Public Acts of 1933, as amended, being section 141.101 to 141.139 of the Michigan Compiled Laws, or the issuance of mortgage bonds pursuant to charter authority. An agreement for the joint acquisition of facilities entered into under this act shall be subject to provisions contained in this and other law relating to the issuance of bonds by the municipality. It is declared to be in the public interest and for a public purpose that power utilities be permitted to participate jointly in the development of electric facilities as provided in this act as a means of achieving economies of scale and promoting the economic development of the state; and to this end the issuance of revenue bonds is a public purpose. A municipality may pledge for the payment of the principal of, premium if any, and interest on the bonds, the revenues, or a portion thereof, derived or to be derived from the ownership and operation of the municipality’s system or facilities for the generation, transmission, or distribution of electric power or energy, or its interest in a joint project or projects, except that the proceeds of the bonds issued for a joint project and the faith and credit of the municipality pledged for the bonds shall be dedicated exclusively to the acquisition of the municipality’s undivided share of a joint project as specified in section 11.