For any State and Township approved Senior Citizen Housing Project, the height may be extended to 18 stories or 190 feet, except in the PD Zone where the height limit shall be 130 feet. The parking requirements may be reduced to three spaces for each 10 dwelling units or fraction thereof. The density in R/B-1 and R/B-2 Zones may be increased to a maximum density of 135 dwelling units per acre.