In all cases when the owner or owners of adjoining wharves, docks, landings, or river front, or any part thereof, upon the River Delaware or its tributaries, and not situated in cities of the first class, shall disagree as to the proper apportionment of the wharfage or dockage payable to them, in accordance with their titles, by persons making use of the same or by vessels lying in front thereof, it shall be the duty of the Board of Commissioners of Navigation for the River Delaware and its tributaries,¹ upon the written application of one or more of such owners, and after notice to the parties interested, and in accordance with the established customs and usages of the port or place where such wharves, docks, landings, or river front are located, or, where there is no such usage, then as justice and equity may require, to determine the relative proportions of such wharfage or dockage belonging to the several proprietors of said adjoining wharves, docks, landings, or river front, or any parts thereof: Provided, That nothing herein shall be construed to authorize such Board of Commissioners to take cognizance of any question involving the title of such property, but such jurisdiction, and the power to enforce the rights of the owners of said wharves, docks, landings, and water front to wharfage and dockage from persons or vessels heretofore or hereafter using or lying opposite the same, shall remain as heretofore in the proper courts of law.