89. (1) No person shall be employed or engaged on board a ship unless he enters into an agreement with the owner of the ship in such manner as may be prescribed. (2) Upon an agreement under sub-section (1), a seaman shall be issued a Continuous Discharge Certificate Book by the Shipping Master, on payment of such fee and in such manner as may be prescribed, for recording details of his service. (3) Every Continuous Discharge Certificate Book shall be in duplicate and one copy thereof shall be delivered to the person entitled to the Book and the other shall be kept by the Shipping Master and recorded in the prescribed manner.