91.233 Aircraft lights

• (a) A pilot of an aircraft must not--
  • (1) operate an aircraft at night unless it has lighted position lights; or
  • (2) moor or move an aircraft at night on a water aerodrome unless the aircraft complies with the lighting requirement of the International Regulations for Preventing Collisions at Sea; or
  • (3) operate an aircraft at night that is required by Subpart F to be equipped with an anti-collision light system unless the anti- collision light system is operating.
• (b) A person must not park or move an aircraft at night on a manoeuvring area of an aerodrome that is in use for aircraft operations unless the aircraft--
  • (1) is clearly illuminated; or
  • (2) has lighted position lights; or
  • (3) is in an area that is marked by obstruction lights.
• (c) Notwithstanding paragraph (a)(3), a pilot of an aircraft is not required to operate the anti-collision light system if the pilot determines that, because of operating conditions, it is in the best interest of safety to turn the system off.