Designation of classified persons
20.—(1) Subject to paragraph (2), the employer shall designate as classified persons those of his employees who are likely to receive an effective dose in excess of 6mSv per year or an equivalent dose which exceeds three-tenths of any relevant dose limit and shall forthwith inform those employees that they have been so designated.
(2) The employer shall not designate an employee as a classified person unless—
(a)that employee is aged 18 years or over; and
(b)an appointed doctor or employment medical adviser has certified in the health record that that employee is fit for the work with ionising radiation which he is to carry out.
(3) The employer may cease to treat an employee as a classified person only at the end of a calendar year except where—
(a)an appointed doctor or employment medical adviser so requires; or
(b)the employee is no longer employed by the same employer in a capacity which is likely to result in significant exposure to ionising radiation during the remainder of the relevant calendar year.