Leaving a club right before reset

What are the rules when a person leaves hours before reset? Where do you find these rules?

There are no rules. You can do whatever you want. However, traditionally it’s kind of rude because then the club loses all of the accumulated points the player has generated for the club. This would matter significantly if the club is on the cusp of advancing to a higher league or dropping to a lower league or even on the cusp of a better set of league rewards based on league standing.