The Drug-Free School/Public Park Zone Map approved and adopted pursuant to section 5-5-1 of this chapter shall continue to constitute an official finding and record as to the location and boundaries of areas on or within one thousand feet (1,000') of school property and public park property owned or leased to any elementary or secondary school or school board or municipality which is used for school or public park purposes until such time, if any, that this chapter shall be amended to reflect any additions or deletions with respect to the location and boundaries of such school property and drug- free school/public park zones. (1979 Code § 11-8-2)