DEFINITIONS

In-goal is part of the ground as defined in Law 1 where the ball may be grounded by players from either team.
When attacking players are first to ground the ball in the opponents’ in-goal, the attacking players score a try.
When defending players are first to ground the ball in in-goal, the defending players make a touch down.
A defending player who has one foot on the goal line or in the in-goal who receives the ball is considered to have both feet in in-goal.