When off-street loading spaces are provided and maintained for business, commercial and industrial buildings, they shall comply with the following regulations:
(a) All loading spaces shall be located on the same lot as the use served and no part of any required yard, off-street parking area, or access drive thereto, shall be used for loading or unloading purposes, except as permitted in subsection (f) below.
(b) Access to truck loading and unloading spaces shall be provided directly from a public street or alley or from a right-of-way that will not interfere with public convenience and that will permit the orderly and safe movement of trucks.
(c) No loading area shall be located within 40 feet of the nearest point of intersection of any two streets.
(d) Off-street loading spaces shall not be used for repair or servicing of motor vehicles.
(e) Streets, sidewalks, alleys or other public rights-of-way or other public property shall not be used for loading purposes nor shall vehicles be parked on such areas during loading and unloading, except as otherwise permitted by the Planning Commission.
(f) In the C-3 District, off-street loading areas can occur in off-street parking areas, recognizing that they will be competing with space and shall be limited to the time necessary for loading and unloading purposes.