Designation of classified persons
21.—(1) Subject to paragraph (2), the employer must designate as classified persons those of its employees who are likely to receive an effective dose greater than 6 mSv per year or an equivalent dose greater than 15 mSv per year for the lens of the eye or greater than 150 mSv per year for the skin or the extremities and must immediately inform those employees that they have been so designated.
(2) The employer must not designate an employee as a classified person unless—
(a)that employee is aged 18 years or over; and
(b)a relevant doctor has certified in the health record that that employee is fit for the work with ionising radiation which that employee 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)a relevant doctor 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.