A player’s round starts when the player makes a stroke to start their first hole (see Rule 6.1a). The player must start at (and not before) their starting time:
If the starting time is delayed for any reason (such as weather, slow play of other groups or the need for a ruling by a referee), there is no breach of this Rule if the player is present and ready to play when the player’s group is able to start.
Penalty for Breach of Rule 5.3a: Disqualification, except in these three cases: