(a) The powers conferred by this chapter shall be in addition and supplemental to the powers conferred by any other law and not in substitution for the powers conferred by any other law; however, to the extent the provisions of this law conflict with any other law or are inconsistent with any other law, the provisions of this chapter shall prevail with respect to all bonds and notes issued under this chapter. Bonds or notes may be issued hereunder for any public works project, notwithstanding that any other law may provide for the issuance of bonds or notes for like purposes and without regard to the requirements, restrictions or procedural provisions contained in any other law or any home rule charter, and notwithstanding any other provisions to the contrary contained in any other law or laws. Any proceedings heretofore taken by any local government relating to the subject matters hereof, whether or not commenced under any other law, may be continued hereunder, or at the option of the governing body, may be discontinued and new proceedings instituted under this chapter.

(b) Prior to the adoption or promulgation by the state funding board of guidelines, rules or regulations with respect to the contracts and agreements authorized in §§ 9-21-213(d), 9-21-302(b), 9-21-305(c), 9-21-602(c), 9-21-907(c), 9-21-910(d), 9-21-1006(c) and 9-21-1008(c), a local government may enter into such contracts or agreements to the extent otherwise authorized in this chapter or in any other law notwithstanding §§ 9-21-213(d), 9-21-302(b), 9-21-305(c), 9-21-602(c), 9-21-907(c), 9-21-910(d), 9-21-1006(c) and 9-21-1008(c). Nothing in §§ 9-21-213(d), 9-21-302(b), 9-21-602(c), 9-21-907(c), 9-21-910(d), 9-21-1006(c) and 9-21-1008(c) is intended to alter any existing authority in this chapter or in any other law otherwise providing authority for a local government to enter into the contracts or agreements described in §§ 9-21-213(d), 9-21-302(b), 9-21-305(c), 9-21-602(c), 9-21-907(c), 9-21-910(d), 9-21-1006(c) and 9-21-1008(c) heretofore entered into or entered into prior to the adoption or promulgation by the state funding board of guidelines, rules or regulations.