Rule 18.3; Tacking in the Zone
A boat breaks rule 18.3 at the finish line when she causes a boat who has been on starboard tack since entering the zone to sail above close hauled to avoid contact.
Rule 51 Movable Ballast
Pumping out bilge water for the purpose of changing a boat’s trim or stability does not break rule 51, however, class rules may limit the amount of bilge water allowed and/or put restrictions on the time and/or the type of bilge pump used to bail water out.