controlhas the same meaning as in section 534 of the Income and Corporation Taxes Act 1970.
the prescribed placemeans— a such place in the United Kingdom as the contractor and the authorised officer may agree upon;
the prescribed ratehas the same meaning as in section 89 of the Taxes Management Act 1970 as from time to time increased or decreased by the Treasury in accordance with that section for the purposes of section 86 of that Act;
the Principal Regulationsmeans the Income Tax (Sub-Contractors in the Construction Industry) Regulations 1975.