In the US, it is covered by FAA Advisory Circular AC 120-74B.
TCAS to TA/RA when cleared to Line Up and Wait or to Take Off:
Some cockpit displays of traffic information (TCAS, Traffic Information System (TIS)) have the capability to display traffic behind the aircraft. When pilots are in LUAW, and waiting for takeoff clearance, these systems should be turned on to increase the pilot’s awareness of landing traffic.
Lights:
Exterior Lights. To the extent possible and consistent with aircraft equipage, operating limitations, and flightcrew procedures, pilots should illuminate exterior lights as follows.
(a) Engines Running. Turn on the rotating beacon whenever an engine is running.
(b) Taxiing. Prior to commencing taxi, turn on navigation, position, anti-collision, and logo lights, if available. To signal intent to other pilots, turn on the taxi light when the aircraft is moving or intending to move on the ground, and turn it off when stopped or yielding or as a consideration to other pilots or ground personnel. Strobe lights should not be illuminated during taxi if they will adversely affect the vision of other pilots or ground personnel.
(c) Crossing a Runway. All exterior lights should be illuminated when crossing a runway.
CAUTION: Flightcrews should consider any adverse effects to safety that illuminating the forward-facing lights will have on the vision of other pilots or ground personnel during runway crossings.
(d) Entering the Departure Runway for Takeoff or LUAW. When entering a runway, either for takeoff or when taxiing into LUAW, flightcrews should make their aircraft more conspicuous to aircraft on final behind them and to ATC by turning on all lights, except for landing lights, that highlight the aircraft’s silhouette. Strobe lights should not be illuminated if they will adversely affect the vision of other pilots. At night, and cleared to LUAW, consider lining up slightly to the left or right of the centerline (CL) (approximately 3 feet) to enable a landing aircraft to visually differentiate that your aircraft from the runway lights.
(e) Takeoff. Turn on all lights, including landing lights, when takeoff clearance is received, or when commencing takeoff roll at an airport without an operating control tower.