An authority may issue such types of bonds as it determines, including bonds on which the principal and interest are payable:
(a) Exclusively from the income and revenue of the parking facilities financed with the proceeds of the bonds, or with such proceeds and financial assistance from the State or Federal Governments or from any other source in aid of such projects.
(b) Exclusively from the income and revenue of certain designated parking facilities, whether or not such facilities were financed in whole or in part with the proceeds of the bonds, and including income or revenue from any future extension, betterment, or addition to any such parking facilities thereafter to be established.
(c) From its revenues generally.
(d) From any contributions or other financial assistance from the city, the State or Federal Governments, or from any other source.
(e) From parking meter revenue of the city which may be appropriated by the governing body of the city.
(f) From any combination of these sources.
(Amended by Stats. 1951, Ch. 1388.)