26 C.F.R. § 301.6155-1 Payment on notice and demand.
Title 26 - Internal Revenue
Upon receipt of notice and demand from the district director (including the Director of International Operations) or the director of the regional service center, there shall be paid at the place and time stated in such notice the amount of any tax (including any interest, additional amounts, additions to the tax, and assessable penalties) stated in such notice and demand.
Title 26: Internal Revenue
PART 301—PROCEDURE AND ADMINISTRATION
Time and Place for Paying Tax
Place and Due Date for Payment of Tax
§ 301.6155-1 Payment on notice and demand.