A game may be played under any variation of the rules agreed upon by the captains of the teams involved. However, both captains must agree on any variation of the rules, and any rule change must not interfere with the games of other teams. In addition, pressuring another captain to change the rules against their will is a violation of the Spirit of the Game.
The following fixed PUL rules are not amendable by captains:
- If there is lightning, games must be stopped immediately and the fields cleared
- If there is standing water on the field the game is cancelled
- If playing on the field is causing any damage due to wetness, the game must be stopped immediately