Federal transportation law under Title 49 of the Code of Federal Regulations, Part 661, which requires that all purchases of vehicles, equipment or any other manufactured item be of U.S.-made and assembled components, unless the purchase price is less than $100,000 or the U.S. DOT has given the purchaser a Buy America waiver. The grantee must obtain a signed certification from each successful bidder when the total purchase price exceeds $100,000. The Buy America requirement is based on the value of the total procurement, not one item. For example, a purchase of four vans that total $120,000 must comply with Buy America, even though each van costs $30,000. Grantees may request a specific Buy America waiver when domestically produced goods are not available or when there is a price differential of at least 25% between foreign and domestic bids. The Buy America requirement applies to subcontractors regardless of the size of their contract, if the prime contract is more than $100,000.