The Decree, which is divided into five Titles, regulates fishing in the internal waters of the Autonomous Province of Bolzano. Title I regulates fishing waters management. Aquaculture operators shall promote the development and conservation of the fish population and guarantee its natural productivity (art. 2). They may also use the special equipment specified by article 4. Furthermore, aquaculture operators must draw up a cultivation plan in compliance with the criteria set out in this Decree a