(a) Make, change or abolish wharf lines in bays, rivers and harbors.
(b) By ordinance make, modify or abolish regulations for the use of navigation, or for the placing of obstructions in or the removal of obstructions from bays, rivers and harbors.
(2) A port shall have the authority to engage in the control and prevention of river and stream bank erosion, and the prevention of damage from floodwater and sediment, and to make, establish, change, modify or abolish such rules and regulations to preserve natural resources and prevent estuary and stream pollution within the boundaries of the district. [Amended by 1971 c.268 §20; 1971 c.691 §2; 1971 c.728 §140]