Whenever a question arises whether the wages of a seaman or apprentice are forfeited under this Part for desertion from a Saint Lucian ship, it shall be sufficient for the person attempting to enforce the forfeiture to show that—
(a) the seaman or apprentice was duly engaged in or belonged to the ship;
(b) the seaman or apprentice left the ship before the completion of the voyage or engagement; and
(c) an entry of the desertion of the seaman or apprentice was duly made in the official log book,
and the desertion shall be deemed to be proved so far as it relates to any forfeiture of wages under this Part, unless the seaman or apprentice can produce a proper certificate of discharge or can otherwise show to the satisfaction of the court that he or she had sufficient reasons for leaving his or her ship.