British Columbia Sport Fishing Regulations, 1996

41 No person shall fish with a crab trap unless the trap has a section in the top or in a sidewall that has been laced, sewn or otherwise secured by a single length of untreated cotton twine no greater than grade No. 120, which, on deterioration or parting, produces a rectangular opening with a minimum size of 7 cm × 20 cm or a square opening with a minimum size of 11 cm × 11 cm.