The Thrower
If the disc is on the ground, whether in- or out-of-bounds, any member of the team becoming offense may take possession of it.
If possession is gained at the spot where the disc is to be put into play, the thrower must establish a pivot at the spot of the disc.
The thrower should pick up the disc and place the pivot at the spot of the disc.
If possession is gained at the spot where the disc is in play, the thrower must establish a pivot at the spot of the disc.