For uses denoted with “○” in Section 32-141 (Use Group IV – general use allowances), the provisions of this Section shall apply.

1. The following uses may be permitted by special permit of the Board of Standards and Appeals:
   1. Radio or television towers may be permitted in all Commercial Districts, in accordance with Section 73-141 (Radio or television towers).
   2. Electric utility substations on a site no greater than 40,000 square feet may be permitted in C3 Districts, in accordance with Section 73-143 (Electric or gas utility substations).
   3. Public transit or railroad electric substations on a site no greater than 40,000 square feet may be permitted in all Commercial Districts, in accordance with Section 73-146 (Public transit or railroad electric substations).
2. The following uses may be permitted by special permit of the City Planning Commission:
   1. Electric utility substations on a site greater than 40,000 square feet may be permitted in C3 Districts, in accordance with Section 74-142 (Electric utility substations).
   2. Sewage disposal plants may be permitted in all Commercial Districts, in accordance with Section 74-143 (Sewage pumping stations and sewage disposal plants).
   3. Bus stations may be permitted in C1 or C2 Districts, or C4 through C8 Districts, in accordance with Section 74-145 (Bus stations).
   4. Heliports may be permitted in C3 through C8 Districts, in accordance with Section 74-146 (Heliports).
   5. Public transit or railroad electric substations on a site greater than 40,000 square feet may be permitted in all Commercial Districts, in accordance with Section 74-147 (Public transit or railroad electric substations).
   6. Railroad passenger stations may be permitted in all Commercial Districts, in accordance with Section 74-148 (Railroad passenger stations).
   7. Seaplane bases may be permitted in all Commercial Districts, in accordance with Section 74-149 (Seaplane bases).