To restart play:
It is recommended that the following steps be undertaken before checking the disc in:
when the thrower has the disc:
if there is not a defender within reach, the thrower must touch the disc to the ground and should call "Disc In".
If the thrower loses possession as a result of touching the disc to the ground, they can re-establish possession.
if there is not a defender within reach, the thrower must touch the disc to the ground and may call “Disc In”.