Dispensing devices at marine service stations may be located on open piers, wharves, floating docks, shore or on piers of the solid-fill type, but must be located apart from other structures to provide room for safe ingress and egress of watercraft for fueling. Dispensing devices must be in all cases at least 20 feet (20', or 6 m) from any activity involving fixed sources of ignition.
Okla. Admin. Code § 165:25-8-16