The bill amends the process for negotiating pay and benefits for Postal Service supervisory and managerial personnel. It requires the Postal Service to provide a written proposal to supervisors' and postmasters' organizations 60 days before the expiration of a pay decision, and to provide a written proposal for changes in pay policies and benefits within 60 days of reaching an agreement with a bargaining representative. The bill also modifies the dispute resolution process, stating that the final determination from the panel will be binding upon the Postal Service, supervisors' organization, and postmasters' organization.