(a) Each helicopter fueling facility must be marked adjacent to the fueling hose storage: ``WARNING--HELICOPTER FUELING STATION--KEEP LIGHTS AND FIRE AWAY''.
(b) Each storage tank for helicopter fuel must be marked: ``DANGER--FLAMMABLE LIQUID''.
(c) Each access to a helicopter landing area must be marked: ``BEWARE OF TAIL ROTOR''.
(d) Each marking required by this section must be in letters at least 7.5 centimeters (3 inches) high.