d) The principle of cooperation in the management of shared resources, which implies the adoption of common measures for the management of shared resources and the harmonization and coordination of the systems for the management of these resources by the States concerned, with a view to their preservation and sustainable use.

The following is expressly forbidden: a) The use, in the course of fishing activity, of equipment, explosive materials or toxic substances likely to weaken, stun, excite or kill marine species; b) The use of mesh-obstructing devices in the course of fishing; c) The transport and holding on board fishing vessels of the equipment, materials and substances mentioned in the previous paragraphs without authorization.

The following are very serious fishing offenses: a) The exercise of industrial fishing in waters under national jurisdiction without a fishing license or authorization issued under the terms of this decree-law and its regulations. b) Fishing in prohibited and reserved areas or during prohibited periods or for species whose catch is prohibited or with prohibited fishing gear; c) Fishing in prohibited or closed areas, temporarily or permanently, for specific reasons, namely public health, environmental protection, safety and maritime traffic or for other reasons of public interest. d) The use of a vessel for a fishing operation other than that provided for in the license it holds; e) The use of light sources, explosive materials or toxic substances referred to in Article 25 a) and b) of this Decree-Law for fishing, and their transport on fishing vessels without authorization. f) Transporting catches in waters under national jurisdiction without authorization; g) The throwing overboard of any objects or substances likely to harm the marine environment; h) Intentionally destroying or damaging vessels and fishing gear belonging to third parties; i) Failure to comply with the rules on the obligation to unload fish in favor of the State, in return for the granting of fishing licenses or as a supplement to the respective fees. j) Assaulting a fisheries inspector in the exercise of their duties to monitor compliance with the provisions of this statute and its regulations.

The following are serious fishing offenses: a) Fishing without having the original fishing license or authorization required on board; b) Fishing industrially in Guinea-Bissau's Exclusive Economic Zone without a fisheries observer on board; c) Using prohibited fishing techniques or methods; d) Obstructing the work of fisheries inspectors and observers in carrying out their duties of monitoring and observing compliance with the provisions of this Decree-Law and its regulations; e) The use or transport on board, in conditions that permit their use, of prohibited or unlicensed fishing gear or gear whose mesh sizes are smaller than the minimum authorized, or the attachment of devices or systems that may obstruct or reduce these mesh sizes or alter the selectivity of the gear; f) Falsifying, concealing, destroying or tampering with evidence of fishing offenses that may be used in the course of administrative or judicial proceedings; g) Providing false information, data and documents on the technical specifications of fishing vessels authorized to operate in waters under national jurisdiction, in particular on gross tonnage; h) Catching, holding, landing, storing, processing, transporting and offering for sale fishery products that do not comply with the rules on minimum authorized sizes or weights; i) Failure to comply with the rules on by-catches and their destination; j) Carrying out related fishing operations, involving the joint action of two or more vessels, in waters under national sovereignty and jurisdiction, without authorization; k) Failure to comply with the rules on the provision of data and information on catches, prescribed in Article 21(1)(c) of this statute and its regulations; l) Failure to comply with the obligation to provide information, provided for in Article 21(3) of this Decree-Law, or the intentional provision of false or incomplete information, data and documents; m) Failure to comply with the rules laid down in articles 27, 29 and 31 of this decree, relating to protected species, the marking of fishing vessels and the stowage of unauthorized fishing gear, respectively; n) Refusal by a fishing vessel in waters under the jurisdiction of Guinea-Bissau to stop on the orders of inspection agents, given under the terms of Article 46(1)(a) of this Decree-Law; o) Setting up and operating marine culture establishments and fisheries product processing establishments without being authorized and licensed, respectively, under the terms of the respective legislation; p) The use of fishing gear that is not duly signposted and identified, in accordance with the applicable provisions; q) Fishing with vessels whose propulsion power exceeds that legally established for the type of fishing for which they are licensed; r) Failure to comply with the provisions of Article 21(1)(c), regarding the provision of information and data on catches made and any other information useful for understanding catches and fishing operations carried out.

1. The capture of, in particular, species of marine mammals, sea turtles and crocodiles, rays and sharks, as well as other species considered rare and vulnerable, shall be prohibited, unless special authorization is granted by joint order of the members of the Government responsible for the fisheries, agriculture and environment sectors and for scientific or technical research purposes.
2. The hunting, capture and possession of all species of marine and aquatic birds, as well as the holding on board, landing, marketing or offering for sale of the species referred to in the previous paragraph are also prohibited.