Was just looking for information on this topic when I stumbled on this thread. Thought I'd add my 2 cents.
Found
another reference to this.
Code:
6.3.10 All aircraft lights should be used to help controllers and other pilots to see the aircraft. Fixed navigation lights and taxi lights should be on whenever the aircraft is moving. Landing lights should be turned on when cleared for take-off.
I think given all this information,
1. When crossing an active runway, turn on ALL lights
2. If entering a runway for the purpose of taking-off, then LDG LGTs come on when cleared & rolling.