S.L. 234.51 · Merchant Shipping (S.L. 234.51)
S.L. 234.51 Art. 13Change in conditions relating to medical certificate.
PART II
If a qualified medical practitioner has reasonable grounds to believe that -
(a) there has been a significant change in the medical fitness of a seafarer during the period of validity of the medical certificate; or
(b) had he been in possession of full details of the seafarer’s conditions when issuing the medical certificate, and having regard to the provisions of rule 9, would not have reasonably considered the seafarer fit to be issued with such certificate; or
(c) the medical certificate was issued otherwise than in accordance with these rules, the medical practitioner shall notify the seafarer concerned and may -
(i) suspend the validity of that certificate until the seafarer has undergone a further medical examination;
(ii) suspend the certificate for such period as the medical practitioner considers the seafarer will remain unfit to go to sea; or
(iii) cancel the certificate if the medical practitioner considers that the seafarer is likely to remain permanently unfit to go to sea.