No land shall be used or occupied and no structure shall be erected or used for nonresidential purposes in any use district requiring the loading and unloading of goods unless off-street loading spaces are provided. Further, for each nonresidential use or structure with a gross floor area of 30,000 square feet or less in which commodities are sold, displayed, serviced, repaired, altered or fabricated as the principal use of the parcel or lot, one off-street loading bay shall be provided, with an additional loading bay for each additional 50,000 square feet of floor area, except that additional off-street loading bays shall be required by the Inspector of Buildings when necessary to provide adequate area for off-street loading.

Each such loading bay shall have minimum dimensions of 45 feet by 14 feet and 14 feet in height and may be located either within a building or outside and adjoining an opening in the building. Every part of such off-street loading bay shall be located completely off the street. In case trucks, trailers or other vehicles larger than the dimensions of the minimum requirements habitually service the building in question, additional space shall be provided so that such vehicles park or stand completely off the street.

Each loading bay shall be developed as follows:

There shall be filed with every application for a construction permit a plan showing provisions for any off-street loading bays and use before the issuance of any building permit.