Every distinct wording since 2010, newest first.
July 12, 2019 · Core Set 2020
A player may take some special actions any time they have priority. A player may take other special actions during their main phase any time they have priority and the stack is empty. See rule 116, “Special Actions.”
February 1, 2010 · Worldwake
In an EDH game, each player begins the game with a starting life total of 40 instead; see rule 903, "EDH."