The provisions of sections 40-33-26 through 40-33-29 shall not apply to any case in which a municipality determines that the acquisition of a public transportation system should be financed through general obligation bonds only, or through revenue bonds only, it being the intention of the legislative assembly that sections 40-33-26 through 40-33-29 shall apply only in cases in which such financing is to be accomplished through a combination of revenue bonds and general obligation bonds.