(1) This regulation applies if the chief health officer—
(a) has been notified (by notice under regulation 42 or 43— the cancer notice ) that a person ( the cancer patient ) has cancer; and
(b) the cancer notice does not properly comply with the approved form, or is unclear.
(2) The chief health officer may, by written notice, request a doctor who has professionally attended the cancer patient to give the chief health officer any specified information required to be included in the cancer notice.