The main purpose of this legislation is to ensure that U.S. Representatives and Senators can only use government funds to purchase or lease motor vehicles that are made in the United States by unionized workers. The goal is to support American manufacturing and labor by promoting vehicles produced under collective bargaining agreements. Key provisions of the legislation include specific requirements for the purchase or lease of motor vehicles using official funds. It states that any vehicle must be assembled in the U.S. and must be made by workers who are part of a union.