The player taking the kick-in/roll-in: • must have part of each foot on the touch line or on the ground outside the touch line at the moment of kicking/rolling the ball • must use an underarm action when rolling the ball in

I think for a kick in, it's clear what has to happen. So, firstly, the ball has to be stationery and on the touch line. Therefore the kicker physically must be close enough to the ball to kick it when it is in the required position. that is with either one foot on the touchline or very near to it - say within a foot or so. However, the position is far less clear for a throw in. The ball is not going to be on the line and stationery and therefore there is no physical requirement, as I have described above.  Further, the law does not specify how close "or on the ground outside the touch line" actually means.  Therefore potentially the thrower in can be , say, 6 yards away from the line. But I'm sure all refs would require the player to come as close to the line as possible.

I think for a kick in, it's clear what has to happen. So, firstly, the ball has to be stationery and on the touch line. Therefore the kicker physically must be close enough to the ball to kick it when it is in the required position. that is with either one foot on the touchline or very near to it - say within a foot or so. However, the position is far less clear for a throw in. The ball is not going to be on the line and stationery and therefore there is no physical requirement, as I have described above.  Further, the law does not specify how close "or on the ground outside the touch line" actually means.  Therefore potentially the thrower in can be , say, 6 yards away from the line. But I'm sure all refs would require the player to come as close to the line as possible.