39 U.S.C. § 2201
No postal equipment or supplies manufactured by convict labor
Except as provided in chapter 307 of title 18, the Postal Service may not make a contract for the purchase of equipment or supplies to be manufactured by convict labor.
Except as provided in chapter 307 of title 18, the Postal Service may not make a contract for the purchase of equipment or supplies to be manufactured by convict labor.