50.—(1) The emergency code or the basic rate code used by the employer in accordance with regulations 47 to 49 is treated, for the purposes of Parts 2 to 4 (codes; deduction and repayment of tax; payments, returns and information) as having been issued by the Inland Revenue as the code for use in respect of the employee.
(2) This does not apply for the purposes of regulation 18 (objections and appeals) and regulations 46 to 49 and 51 to 53 (Form P46 procedure and late presentation of Form P45).