In Commercial Districts within the Core Subdistrict, as shown on Map 1 in Appendix A of this Chapter, and areas outside of a subdistrict, accessory off-street parking spaces shall be provided if required by Section 36-21, as modified by the provisions of Section 97-50 (SPECIAL OFF-STREET PARKING AND OFF-STREET LOADING REGULATIONS), inclusive, except that no accessory parking spaces shall be required for commercial uses in C4-4D Districts.