In accordance with the provisions of article XV of the Waterfront Commission Act, the following priorities of employment are designed to be consistent with the priorities established in the seniority article of the collective bargaining agreement between the New York Shipping Association and the Port Police and Guards Union. The listing of these priorities shall not be construed to limit in any way the right of the parties to the collective bargaining agreement to alter, modify, amend or otherwise change such priorities or agree upon any other method for the selection of licensed employees by way of seniority, experience, or otherwise.