26 C.F.R. § 1.871-6
Duty of withholding agent to determine status of alien payees
For the obligation of a withholding agent to withhold the tax imposed by this section, see chapter 3 of the Internal Revenue Code and the regulations thereunder.
For the obligation of a withholding agent to withhold the tax imposed by this section, see chapter 3 of the Internal Revenue Code and the regulations thereunder.