This subsection does not require the disclosure of information by an ocean common carrier unless there exists an applicable and otherwise lawful collective bargaining agreement pertaining to that carrier. A disclosure by an ocean common carrier may not be deemed an admission or an agreement that any work is covered by a collective bargaining agreement. A dispute about whether any work is covered by a collective bargaining agreement and the responsibility of an ocean common carrier under a collective bargaining agreement shall be resolved solely in accordance with the dispute resolution procedures contained in the collective bargaining agreement and the National Labor Relations Act (
29 U.S.C. 151 et seq.), and without reference to this subsection.