In any such development or enlargement consisting of a community center serving primarily the residents of the zoning lot, the Board of Standards and Appeals may permit the density regulations set forth in Sections 24-20 (APPLICABILITY OF DENSITY REGULATIONS TO ZONING LOTS CONTAINING BOTH RESIDENTIAL AND COMMUNITY FACUILITY USES) or 35-40 (APPLICABILITY OF DENSITY REGULATIONS) to be modified, provided that the total number of dwelling units permitted by these Sections and all other applicable bulk regulations set forth in Articles II and III of this Resolution shall not be increased by more than 10 percent.