With respect to the ports of Newport and Galilee, the department of environmental management shall maintain, manage and operate these ports in a manner that is consistent with their current use, for not less than ninety-nine (99) years, so that the commercial fishing industry is guaranteed the use of not less than the current portion of these ports as is currently being employed to support the commercial fishing industry and to guarantee the commercial fishing industry not less than the current amount of dockage being occupied on July 7, 1999.