A maximum of five single-family or duplex lots are permitted to subdivide off of an existing lot of record. In no case shall each subdivided lot have less than five feet of street frontage. If all flag lots utilize the reduced pole width option in paragraph 6.12.5A.2, the combined width of all poles must be at least 12 feet in width. If any flag lot is a standard flag lot as outlined in paragraph 6.12.5A.1, the combined width of all poles must be at least 20 feet in width. A shared driveway may be used as the sole access to all such lots.