Within the Special College Point District, all developments, or enlargements of 20 percent or more in floor area, shall provide street trees in accordance with Section 26-41 (Street Tree Planting). In addition, any building where 20 percent or more of the floor area is converted shall provide street trees in accordance with Section 26-41. The street frontage used to calculate the number of required trees may exclude the street frontage occupied by curb cuts serving uses listed in Use Groups 16B, 16C, 16D, 17 and 18.