4.—(1) It shall be the duty of the outside undertaking which employs an outside worker to undertake activities in the controlled area of an operator—
(a)before commencing the activities, to make suitable arrangements to obtain from the operator information about the radiological risks relevant to the intended activities and to the controlled areas in which they are to be undertaken and about any special training that may be required;
(b)to ensure that the outside worker concerned has received the necessary information and training with a view to ensuring his safety in the course of those activities; and
(c)to make suitable arrangements with the operator to ensure that an estimate is made of the dose received by the worker in the course of those activities.
(2) Where an outside undertaking employs an outside worker to work in Northern Ireland or another member State, the outside undertaking shall make suitable arrangements to ensure that a continuing record of the assessment of the dose received by the outside worker is maintained by the approved dosimetry service throughout the period of his employment by the outside undertaking.