Miss. Code Ann. § 45-43-11

(1) If a pool yard enclosure is constructed or modified before July 1, 2012, the provisions of this chapter shall not apply, except that any gate in a pool yard enclosure shall conform to Section 45-43-9 no later than January 1, 2013. (2) This chapter provides no exemption from any local ordinance that may apply to the pool yard enclosure. (3) A pool yard enclosure modified on or after July 1, 2012, shall conform with this section and Sections 45-43-7 and 45-43-9 as a part of the modification.