Port districts are hereby authorized for the acquirement, construction, maintenance, operation, development and regulation of harbor improvements, land and water transfer and terminal facilities, industrial and economic development, and other development, facilities, and services, reasonably incident to a modern, efficient and competitive port, and may be established under this act in any county bordering upon any continuous waterway system, limited to the port area, which will float commercial tug and barge vehicles to ports handling transoceanic traffic, as in this act provided.