Once again WR has missed the chance to really simplify and remove the anomalies from the touch Laws. Simply adopting the RL touch laws in their entirety (leaving out the parts that are not applicable to RU such as the play the ball and scrum restarts) would hace been a far better way yo go.
From ARL Laws of the Game: SECTION 9 TOUCH AND TOUCH IN-GOAL
1. Ball in Touch. The ball is in touch or touch in goal when it or a player in contact with it touches the touchline or the touch-in-goal line or the ground beyond, or any object (other than a player) on or outside the touchline or touch-in-goal line.
2. Jumping Player. The ball is in touch if a player jumps from touch and knocks ball back while off the ground touches the ball. The ball is not in touch if during flight it crosses the touchline or touch-in-goal line or dead ball line but is knocked back by a player who is off the ground after jumping from the field of play.
3. Point of Entry. When a ball has entered touch, the point of entry shall be taken as the point at which the ball first crossed the touch or touch in-goal line.
4. Stationary ball. Where the ball, which is stationary in the field of play or the in-goal area, is touched by a player in touch, touch-in-goal or over the dead ball line, the ball is deemed to have been put in touch or made dead by that player, otherwise it is deemed to have been made dead by the player who last played it.
These four definitions would cover everything.