Historical Rules · 13 July 2018
Rule 100.6
Official source text from the 13 July 2018 Rules release
Most Magic tournaments (organized play activities where players compete against other players to win prizes) have additional rules covered in the Magic: The Gathering Tournament Rules (found at WPN.Wizards.com/en/resources/rules-documents). These rules may limit the use of some cards, including barring all cards from some older sets.