The main purpose of this legislation is to protect the United States Postal Service (USPS) processing and distribution centers from being closed or consolidated in any state. The goal is to ensure that every state has at least one processing and distribution center, which is crucial for maintaining efficient mail services. Key provisions of the legislation include a clear definition of what constitutes a processing and distribution center. These centers are essential facilities that handle the distribution and dispatch of both incoming and outgoing mail for specific areas.