The rules have been updated since 2017 to mean that “catch” and “possession” no longer mean the same thing. A “catch” is when the disc is first controlled by the receiver. Once a player has caught the disc, they can go out-of-bounds, or have the disc touch the ground, and this is not a turnover, as long as they maintain the catch while out-of-bounds or while the disc is touching the ground, and they subsequently establish possession of the pass. A player establishes possession of a pass when:- they catch a pass and then they maintain that catch for more than one noticeable instant, and- they maintain the catch throughout all ground contact related to the catch, or until they throw the disc For a disc to be considered “trapped” the disc must be held firmly between at least two body parts and should not move relative to those two body parts.If a player initially catches a pass and then, prior to establishing possession, they do not maintain the catch (‘maintain the catch’ means to continue to have a non-spinning disc trapped between at least two body parts), that initial catch is deemed to have ended.A player may change the body parts that are being used to trap the disc, and as long as the disc continues to be trapped by at least two of the body parts during that change, it is considered the same catch (for example if a player traps the disc to their chest with their right hand, they can grab the disc by the rim with their left hand and take the disc away from their chest, and as long as they only remove their right hand once the left hand has grabbed the disc, it is considered the same catch).