Fisheries Act (Act No. 4003).

This Act provides for the protection and conservation of fishery resources such as the declaration of open and closed seasons, protection of fry or fish eggs, prohibition of the use of poisonous substances and explosives in fishing, and prevention of water pollution. The Act shall apply to fishing and fisheries in Philippine waters, including inland and marine waters.
The Act also contains special provisions on: the gathering of molluscs, sponges and marine turtles; the grant of licences or permits; the setting of minimum sizes of fish, shellfish or turtles that may be caught; and restrictions of certain fishing practices in certain places or time of the year.