RSA 211:31: Limitation.

I. No person, except the owner or a conservation officer, shall take up, lift, molest, have in his possession, or transfer any pot, trap, car or other contrivance that is set for the taking or holding of lobsters or crabs, nor take, remove or carry away from the beach or shore, any such pot, trap, car or other contrivance or warp or buoy without the written permission of the owner. In addition to the penalty for violation of this section, said person, if he holds a license, shall lose said license for one year.

II. The executive director of the fish and game department shall post sufficient permanent signs in proper places as the executive director deems necessary to inform the public of the provisions of RSA 211:31, I.