This bill significantly alters the United States Postal Service's procedures for closing or consolidating post offices. It mandates that the Postal Service conduct a public hearing during the 60-day public comment period, allowing in-person or virtual attendance. A summary of this hearing, including public comments and their support/opposition percentages, must be published online within seven days, and no closure can occur until 180 days after this publication. Furthermore, the bill prohibits the closure or consolidation of a post office if it is not within 15 miles of any other post office or if it is the closest post office for 15,000 or more individuals. The legislation also imposes new restrictions on changes to processing and distribution centers (P&DCs) and transportation optimization. The Postal Service cannot implement changes to mail processing facilities without first obtaining an advisory opinion from the Postal Regulatory Commission (PRC), which must be issued within 120 business days. If the PRC determines a proposed change will lead to slower mail delivery, the Postal Service must publish a report on mitigation strategies, delaying implementation for 180 days. Additionally, the bill prohibits closing P&DCs in certain non-contiguous regions of states or in districts that failed to meet specific on-time delivery benchmarks in the preceding year. It also restricts Local Transportation Optimization (LTO) and Regional Transportation Optimization (RTO) efforts that decrease mail pickup/drop-off frequency without a favorable PRC opinion, and explicitly prohibits the Mail Processing Facility Review program.