It's not a NOTAM. It is an Advisory Circular(AC) Operation Lights ON, saying that all pilots should adhere to it in order to promote safety in the skies. It also talks about strobe lights on when entering runways, take off/landing lights on when cleared for takeoff etc. It is not a requirement but they urge everybody to do it so most airlines have included it in their day to day flying.
It is also mentioned in the FAR/AIM.
I hope this helps
