Minimum games played (daily chess): 200
Vacation is permitted. For informations about how long can a player take vacation, click here:
https://support.chess.com/article/371-how-much-vacation-does-my-opponent-have
https://support.chess.com/article/624-how-does-vacation-work-how-much-time-do-i-get
By "veterans" I simply mean "players who have played at least 200 games (daily chess)" on Chess.com.
If you want to be sure not to miss the chance to be invited every time I create a tournament, click on the following link and join my club:
https://www.chess.com/club/tournaments-for-veterans