(1) Where a seaman is, by reason of illness, incapable of performing his or her duty, and it is proved that the illness had been caused by his or her own wilful act or default, or is a sickness or infirmity wilfully concealed at the time of the engagement of the seaman, the seaman shall not be entitled to wages for the period during which he or she is, by reason of the illness, incapable of performing his or her duty.