This bill, known as the "Postal Service Transparency and Review Act," significantly increases oversight over proposed changes to postal services. It amends title 39, United States Code, to mandate that the Postal Service (USPS) submit any proposed change affecting service nationwide, substantially nationwide, or significantly within a postal district to the Postal Regulatory Commission (PRC) for an advisory opinion. This submission must occur at least 180 days before the proposed effective date of the change. The PRC is required to issue its advisory opinion within 180 days of receiving the proposal, and the USPS is explicitly prohibited from implementing or spending funds on the change until this opinion is issued. The bill also grants the PRC authority to suspend the implementation of any change if the USPS fails to seek the required advisory opinion, compelling a return to prior service levels until proper review is initiated. Furthermore, the legislation applies Chapter 8 of title 5, the Congressional Review Act (CRA) , to these proposals. This allows Congress a 60-legislative-day period, after the PRC's advisory opinion, to introduce and pass a joint resolution of disapproval, thereby preventing the proposed postal service change from taking effect and enhancing legislative accountability.