It's in the notes at the bottom of page 21.
Where the ball which is stationary in the field of play or the in-goal area comes in contact with a player in touch, touch in-goal or over the dead ball line, the ball is deemed to have been made dead by that player.
Should the ball, whilst in general play, be made dead by a player straddling, or over, their own dead ball line or touch in-goal line, play will re-start with a goal line drop-out (S8, Law 4(i)Page 19).