May move freely to catch the ball; Must maintain control of the ball through contact with the ground for a valid catch; For special catches (one-handed, jumping), must clearly demonstrate the technique
Why people argue about this
People often assume that a catcher can simply dive into the ground to make an end zone catch without maintaining contact with the ground, thinking it's just about reaching for the ball. However, they misunderstand the "Catcher Rules" which require not only catching but also maintaining contact with the ground to validate the play, regardless of where in the end zone the catch occurs.