Historical Rules · 15 July 2011
Rule 604.3
Official source text from the 15 July 2011 Rules release
Some static abilities are characteristic-defining abilities. A characteristic-defining ability conveys information about an object's characteristics that would normally be found elsewhere on that object (such as in its mana cost, type line, or power/toughness box). Characteristic-defining abilities function in all zones. They also function outside the game.