13-188-34 Me. Code R. § 04
Except as provided for Atlantic Halibut, It is unlawful to fish commercially in Maine's territorial waters for any species of groundfish, as defined in Chapter 34.01 (F), except in accordance with the following methods and restrictions:
The minimum mesh size for any otter or beam trawl net on a vessel, or used by any vessel fishing in Maine's territorial waters, shall be 6 inches diamond mesh or 6.5 inches square mesh in the body and wings, and 6.5 inches diamond mesh or square mesh in the cod end.
Sink gillnets must have a mesh size of at least 6.5 inches and be labeled with the owner's commercial fishing license number. Gillnet fishermen may not fish more than fifty sink gillnets at one time. Sink gillnets with mesh measuring less than 6.5 inches are illegal and subject to seizure.
The use of hooks on any commercial fishing vessel engaged in tub trawling or long lining shall be 12/0 or greater circle hooks and limited to 250 in number except as provided for Atlantic Halibut in this chapter.
The use of de-hookers or "crucifiers" with less than 6-inch spacing between the fairlead rollers is prohibited.
13-188 C.M.R. ch. 34, § 04