Any duties and obligations of the authority which shall be delegated by the board of directors of the authority to the Highway Department, the State Docks Department or any other public corporation, agency or department of the state shall be undertaken and discharged by the public corporation, agency or department to which such duties and obligations shall have been delegated; provided, that such a delegation shall not be effective and shall not release the authority from the duties and obligations proposed to be delegated nor impose any duties or obligations on the public corporations, agencies and departments to which a delegation shall have been made unless the Governor and the director, head or governing body of the public corporation, agency or department to which a delegation shall have been made shall approve such delegation in all respects; and, provided further, that the public corporation, agency or department shall at the time of such delegation be empowered by laws other than this chapter to perform duties and discharge obligations of the kind delegated and that this section shall not be construed to change the lawfully established nature and functions of public corporations, agencies and departments of the state.