11.—(1) Subject to the following provisions of this regulation, no practitioner or operator shall carry out a medical exposure or any practical aspect without having been adequately trained.
(2) A certificate issued by an institute or person competent to award degrees or diplomas or to provide other evidence of training shall, if such certificate so attests, be sufficient proof that the person to whom it has been issued has been adequately trained.
(3) Nothing in paragraph (1) above shall prevent a person from participating in practical aspects of the procedure as part of practical training if this is done under the supervision of a person who himself is adequately trained.
(4) Every employer shall keep and have available for inspection by the Department an up-to-date record of all practitioners and operators engaged by him to carry out medical exposures or any practical aspect of such exposures showing the date or dates on which training qualifying as adequate training was completed by such practitioner or operator and the nature of the training.
(5) Where the employer enters a contract with another to engage a practitioner or operator otherwise employed by that other, the latter shall be responsible for keeping the records required by paragraph (4) and shall supply such records to the employer forthwith upon request.