Civil Code (Cap. 16), article 676

676. (1) A will made at sea, on board any ship registered in Malta, may be received, in writing, by the master, or the person acting in his stead. (2) A will made by the master may be received by the person who in his absence, would have the command of the ship. (3) In all cases, the will shall be received in duplicate, and in the presence of two witnesses who have attained the age of eighteen years. (4) Non-compliance with any of the foregoing requirements shall render the will null and void. By whom such wills are to be signed.