In the Special Downtown Jamaica District, the use regulations of the underlying C4-5X, C6-2, C6-3, C6-4 and M1-4 Districts shall be modified to permit public parking garages with a capacity of 150 spaces or less, as-of-right, subject to the provisions set forth for accessory off-street parking spaces in Sections 36-53 (Width of Curb Cuts and Location of Access to the Street), 36-55 (Surfacing) and 36-56 (Screening). Public parking garages may be open or enclosed, provided that no portion of such use shall be located on a roof other than a roof which is immediately above a cellar or basement, except as provided by the special permit provisions of Section 74-194 (Parking garages or public parking lots in high density central areas).