Nothing in Laws, 2001, ch. 443 shall require the dissolution of any local historic preservation commission created in Mississippi before July 1, 2001. Any local historic preservation commission created by ordinance before July 1, 2001 shall continue in existence and continue to have all of the purposes, powers and authority set out in the ordinance creating such commission. Any such previously created commission may be given the powers set forth in this chapter if a governing authority reenacts a local ordinance in conformity with this chapter.
No designation of a historic district or landmark or landmark site shall be invalidated because the designation was made under a valid ordinance before July 1, 2001.