(1) A registered medical practitioner attending to or called in to visit a patient whom he or she believes to be suffering from an occupational disease or other disease contracted in the course of his or her employment shall, unless such a notice has been previously sent, promptly send, addressed to the Department of Labour and the Chief Medical Officer, a notice stating the name and full postal address of the patient and the disease from which, in the opinion of such medical practitioner, the patient is suffering and the name and address of the place at which, and of the employer by whom, he or she is or was last employed.