In all districts, the regulations of this Chapter applicable to community facility uses shall not apply to non-profit hospital staff dwellings. In lieu thereof, the regulations applicable to residences shall apply, as follows:  

(a)    the regulations of an R5 District shall apply to non-profit hospital staff dwellings located in R1, R2 and R3 Districts; 

(b)    the regulations of an R6 District shall apply to non-profit hospital staff dwellings located in R4 and R5 Districts; and 

(c)    the regulations of an R10 District shall apply to non-profit hospital staff dwellings located in R6 through R10 Districts.