GOAL-LINE DROP-OUT
If the ball is held up in in-goal, there is a knock-on from an attacking player in in-goal or an attacking kick is grounded by the defenders in their own in-goal, then play restarts with a goal line drop-out anywhere along the goal line.
The intention: To encourage variety in attacking play close to the goal line and to increase ball in play time by replacing a scrum with a kick that must be taken without delay. An opportunity for counter attack is also created.
Links to law: Law 12 (restart kicks section), Law 21.16