All tolls, imposts, charges and duties authorized hereunder for the use of said wharves and other structures occupying the lands of the state or connected therewith, at all times hereafter, shall be subject to regulation and revision by the Legislature or other authority now existing or hereafter created by it for such purpose, together with the right and authority of the Legislature to fix and define or to delegate to an authority constituted by it the right and power to fix, define and prescribe reasonable tolls, imposts, charges and duties for the use of said wharves and other structures, and to prevent unjust discriminations with respect thereto.