Sec. 1271.24. Unattended aircraft to be secured in approved manner

(a) No person shall park an aircraft or leave the same standing on a public landing area, public ramp and apron area, public passenger ramp and apron area, public cargo ramp and apron area, public aircraft parking and storage area, or operational area at the air terminal except at such places as may be prescribed or permitted by the airport operator. When in such an area, every aircraft shall be firmly tied to the ground by ropes and stakes, or otherwise properly secured or attended. The main landing wheels of every such aircraft shall be chocked with wheel blocks or other approved devices, except in cases where, in the opinion of the manager, other proven procedures are equally safe.

(b) Helicopters shall have braking devices and/or rotor mooring blocks applied to the rotor blades.