In the event that any city to which this act applies, has taken preliminary proceedings relating to the authorization and issuance of revenue bonds but said bonds have not yet been issued, the governing body of said city may, if it deems it advisable, pledge the revenues derived from the off-street parking facilities and the on-street parking meters of said city in the same manner and to the same extent as provided in this act.
K.S.A. 13-1392