The off-street parking regulations shall be modified, as follows: 

1. The regulations of Section 25-027 (Applicability of regulations in Community District 14, Queens) shall not apply. In lieu thereof, the regulations of the applicable underlying district shall apply, as modified by the provisions of this Section.
2. In a C2 District mapped within an R7-1 District, the regulations of Section 25-251 (Income-restricted housing units) shall be modified to require an accessory off-street parking requirement of 25 percent per income-restricted housing unit. 
3. For commercial uses in Parking Requirement Categories PRC-A1, PRC-A2, PRC-A3 and PRC-A4, the provisions of Section 36-21 (General Provisions) shall be modified to require accessory off-street parking spaces at a rate of one parking space per 750 square feet of floor area.
   
   For ambulatory diagnostic or treatment health care facilities listed under Use Group III(B), the provisions of Sections 25-31 (General Provisions) and 36-21 shall be modified to require accessory off-street parking spaces at a rate of one parking space per 750 square feet of floor area.
4. Within Subdistrict A, parking spaces provided on private streets shall count towards the number of accessory off-street parking spaces required by the provisions of Sections 36-20 (REQUIRED ACCESSORY OFF-STREET PARKING SPACES FOR COMMERCIAL OR COMMUNITY FACILITY USES) and 36-30 (REQUIRED ACCESSORY OFF-STREET PARKING SPACES FOR RESIDENCES WHEN PERMITTED IN COMMERCIAL DISTRICTS). For such parking spaces located within private streets, the provisions of Section 28-40 (PARKING FOR QUALITY HOUSING) shall not apply.