This bill mandates that executive agencies require comprehensive information from bidders for federal motor vehicle procurement contracts. Bidders must disclose the mailing address of each assembly plant, a description of what is made there, and detailed wage information including average, minimum, and maximum hourly wages for employees. They must also report the number of temporary non-permanent employees and any National Labor Relations Act or Occupational Safety and Health Administration violations at each plant. Additionally, awarded contracts must include an explicit policy of neutrality by the contractor regarding any labor organizing efforts by employees at covered motor vehicle plants. Contractors seeking to change an assembly plant must obtain written permission from the agency, providing updated labor information for the new facility and notifying affected labor organizations, ensuring ongoing transparency and adherence to labor standards. A key provision specifically prohibits the expenditure of Federal funds for delivery vehicles unless the Postal Service issues a change order to its contract with Oshkosh Defense. This change order must compel Oshkosh Defense to agree that its execution and compliance with a bona fide union neutrality agreement is material to government payment decisions, and to certify its adherence to such an agreement covering all production employees.