From June 1 through March 14, all crab traps used for commercial purposes must have at least two unobstructed, circular escape vents (rings) which must be two and three-eighths inches or greater in inside diameter. At least one vent (ring) must be in the upper chamber. All vents (rings) must be within two inches of the base of the horizontal partition or the base of the trap. Crab traps constructed of a single chamber must have at least one two and three-eighths inch or larger inside diameter escape vent (ring) located on a vertical surface within two inches of the base of the trap. Traps constructed of one-inch mesh wire and baited only with live male blue crabs are peeler traps and are exempt year round.