The provisions of this Chapter, insofar as they are the same in substance as laws in effect as of December 31, 1973, are intended to continue those laws in effect and not to be new enactments. The enactment of this Chapter does not require the readoption of any county or city ordinance adopted pursuant to laws that were in effect as of December 31, 1973, and that are restated or  revised in this Chapter. The provisions of this Chapter do not affect  any act heretofore done, any liability incurred, any right accrued or vested, or any suit or prosecution begun or cause of action accrued as of January 1, 1974. (1973, c. 822, s. 1.)