Residential districts. The following tree planting requirements shall apply to subdivisions in the "R-1A," "R-1B," "R-1C," "R-1D," "R-1E," "R-2," "SD/C-R1," "SD/C-R2" and "SD/C-R3" Districts. The standards do not apply to individual single-family and duplex dwellings.
a. One (1) tree per fifty (50) feet of street frontage shall be required to be installed within the setback abutting said street frontage. On lots with less than fifty (50) feet of street frontage, one (1) tree shall be required. The required trees may be clustered or arranged within the setback; they need not be placed evenly at fifty-foot intervals.
b. One (1) tree shall also be required to be planted for every two (2) multifamily dwelling units.