Traveling: The thrower must establish and continually maintain a pivot at the appropriate spot on the field until the throw is released. Failure to do so is a travel and is resolved according to 17.K.3, below.
Resolved according to 17.K.3 only if the travel is called, otherwise play continues uninterrupted.
Exceptions:
If a non-standing player loses contact with the pivot spot in order to stand up, it is not a travel, provided the new pivot is established at the same location.
It is not a travel if a player catches the disc and releases a pass before three additional points of ground contact (16.C).