They should never be stationary in it. If they are in it, and light red, they are a red light jumper.
nope. if the light was green when you entered the ASL box, passed the first line, its perfectly permitted for you to stop in the box then because of queuing traffic, or oncoming traffic preventing you from making progress to an exit, this is not a box junction. And if the light goes red whilst you are sat in the box, you havent jumped a red light and are allowed, in fact encouraged to stay put till the next phase.
you are only a red light jumper if you cross the first line of the ASL when the light was already red, technically should be amber as with level crossings, but theyll only prosecute on red.
now its splitting hairs because frankly most drivers move to the 2nd line when the light is red anyway. but Im just highlighting really the infraction only occurs if the traffic light was actually red when they crossed the first line.