All areas within the Township of Mount Holly contained within a redevelopment plan which has been properly adopted pursuant to procedures in N.J.S.A. 40:55C-17 and 40:55C-18 are hereby incorporated within a Redevelopment Plan (RP) District. When from time to time additional areas shall be incorporated within a redevelopment, the Planning Board and the Township Council of the Township of Mount Holly, in conformity with the requirements with N.J.S.A. 40:55C-34 and 40:55C-35, may amend the provisions of this article to include additional property which has been made the subject of a redevelopment plan.