Permitted zones and allowable location for a caretaker dwelling. In the C-1, C-2, C-3, and G Zones, such dwelling shall be located on the second floor, or to the rear of a principal building. In the M-1 and M-2 Zones, such dwelling may be located in accordance with the needs of the applicant. In all zoning districts, a caretaker residence is to be located on the same lot of record or contiguous ownership as the use requiring a caretaker.