Whenever the boundaries of a district are changed so as to transfer an area from one district to another district of different classification, the provisions of sections 9-14-3 through 9-14-11 of this chapter shall also apply to any nonconforming uses existing therein. Whenever the principal permitted uses of a district are changed so as to transfer the principal permitted uses therein to a special permitted use therein or when the principal permitted uses of a district are changed to another district of different classification, provisions of sections 9-14-3 through 9-14-11 of this chapter shall also apply to any nonconforming uses existing therein. (Ord. 609, 4-9-2001)