This legislation aims to significantly modify the process for determining pay and benefits for supervisory and managerial employees within the United States Postal Service. It amends title 39 of the U.S. Code to introduce more structured negotiation requirements between the Postal Service and supervisors' organizations. Specifically, the bill mandates that the Postal Service provide a written proposal to the supervisors' organization 60 days before an existing pay decision expires or within 60 days after a collective bargaining agreement affecting supervisor pay is reached. Furthermore, it strengthens the dispute resolution process by making the final determination of a designated panel regarding pay policies, schedules, and fringe benefit programs legally binding on both the Postal Service and the supervisors' organization, ensuring a definitive resolution to disagreements.