Authority is given to the State of New Jersey, or, through it, to any commission, individual, corporation, or municipality, singly or collectively, designated by the legislature of said State, or by a commission appointed or authorized by said legislature, to improve the channels on the New Jersey seacoast, or any portion of said coast, or the waters adjacent thereto, lying between thirty-eight degrees fifty-six minutes and forty degrees twenty minutes north latitude, by dredging, or by the construction of piers, jetties, or breakwaters, or other river and harbor work of any description or nature adapted to attain the ends now pursued by the United States Government for the advantage of said coast or the relief of commerce: Provided, That such operations shall not encroach upon those portions of said coast, or the channels adjacent thereto, for which the United States Government may undertake similar work according to its own plans: And provided, That the plans for said work shall be placed on file with the Chief of Engineers of the Department of the Army for thirty days, during which time he is authorized to disapprove said plans and forbid such work if, in his judgment, the improvements when completed will interfere with navigation or with any works of the United States Government commenced or proposed to be made: Provided further, That no tolls or other charges upon commerce shall be imposed by those making such improvements: And provided further, That this section shall not be construed as affecting in any way the jurisdiction and control of the Federal Government over any waters that may be improved in pursuance of the provisions thereof, nor as exempting such waters from the operation of the laws heretofore or hereafter enacted by Congress for the preservation and protection of navigable waters. The right to alter, amend, or repeal this section is expressly reserved.