N.H. Rev. Stat. Ann. § 211:34

No pot, trap or other contrivance for taking or holding lobsters or crabs shall be set or buoyed other than plainly and separately except as hereinbefore provided. When pots, traps, or other contrivances are set on trawls, buoys plainly marked as provided in RSA 211:32 and 33 shall be set on both ends of the trawls. Pot or trap trawls used for taking lobsters and crabs which contain less than 5 pots or traps may be plainly marked on one end.