Historical Rules · 13 July 2013
Rule 604.3
Official source text from the 13 July 2013 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.