(1) In a claim for compensation under section 29, if it is established that a prescribed ship has not been heard of for at least 3 months, the ship is taken to have been lost with all on board immediately after the ship was last heard of.
(2) A copy of:
(a) an agreement; or
(b) a list of the employees on a prescribed ship; or
(c) another document showing changes in the employees on a prescribed ship;
which has been prepared for a legal purpose is, in the absence of proof to the contrary, sufficient proof that the employees named in the document were on board the prescribed ship at the time of the loss.