In the Special St. George District, the following modifications to underlying parking and loading regulations shall apply:

In C4-2 Districts:

1. For commercial uses, the off-street parking and loading requirements of a C4-3 District shall apply, except that grocery and convenience retailers listed under Use Group VI with 2,500 or more square feet of floor area per establishment shall require one parking space per 400 square feet of floor area and, for uses subject to PRC-B or PRC-F off-street parking requirements, the requirements of a C4-2 District shall apply.
2. For ambulatory diagnostic or treatment health care facilities listed under Use Group III, the off-street parking requirements of a C4-3 District shall apply.