This legislation establishes a seven-year pilot program enabling the United States Postal Service (USPS) to collaborate with state, local, and tribal governments on ZIP Code boundary changes. Through this program, the USPS may enter into agreements to receive money, property, or services from these governmental entities to cover the net costs associated with requested boundary realignments. A crucial aspect addresses denials: if a request for a ZIP Code boundary change is denied solely due to the net cost to the Postal Service, the USPS must notify the requesting government about this pilot program. It must also provide an estimate of the cost and allow at least 30 days for the government to propose an agreement to defray these expenses. If the requesting entity successfully defrays the cost, and cost was the only dispositive factor for denial, the Postal Service is then required to grant the request. The bill mandates annual reports from the Postal Regulatory Commission to Congress, detailing program activities, including requests, agreements, and costs defrayed. This pilot program is designed to sunset seven years after its enactment, aiming to facilitate local involvement in postal boundary adjustments.