The FAA conducted a safety risk analysis and determined that the use of the words, ?position and hold,? are found in a number of air traffic surface instructions, which potentially misleads pilots when only partial communications are heard. Adoption of the ?Line up and Wait? phraseology provides a unique instruction for pilots to position their aircraft onto a runway from a holding position. 

In accordance with its Safety Management System procedures, the FAA Air Traffic Organization conducted a safety analysis of this recommendation. FAA implemented mitigations to ensure a safe transition from the old phraseology to the new.  

Beginning on September 30, 2010, the words ?Position and Hold? will no longer be used to instruct a pilot to enter the runway and await takeoff clearance. Under the new ?Line Up and Wait? phraseology, the controller will state the call-sign, state the departure runway and state ?Line Up and Wait?. 

Be aware of the phrase "Traffic Holding in Position" will continue to be used to advise other aircraft that traffic has been authorized to "Line Up and Wait" on an active runway. 

Remember you may never cross a hold line without explicit ATC instructions. You may not enter a runway unless you have been instructed to cross or taxi onto that specific runway, cleared to take off from that runway, or  instructed to "Line Up and Wait" on that specific runway.