Any person having the control, receipt, custody,disposal, or payment of specific items of income (a“withholding agent”) must deduct and withhold U.S.income tax from those items, to the extent they aregross income from U.S. sources of foreigners subjectto withholding. (IRC §1441(a)) The withholding agentis liable for the tax. (IRC § 1461)
U.S. Roads are withholding agents for Mexican Roadson Payable Car Hire.