(1) The powers conferred by this chapter are in addition and supplemental to the powers conferred by any other law, and are not in substitution for such powers, and the limitations imposed by this chapter shall not affect such powers.
(2) The powers granted in this chapter may be exercised without regard to requirements, restrictions or procedural provisions contained in any other law or charter, except as expressly provided for in this chapter.
(3) Any county having adopted a metropolitan form of government may create a metropolitan celebration authority as provided in this chapter without the necessity of a charter amendment, notwithstanding anything in its charter to the contrary.