[...]
(3) An International Tonnage Certificate (1969) held by a Canadian vessel remains valid and shall not be cancelled, and a new certificate shall not be issued before 12 months after the day on which the current certificate is issued, if a decrease in the net tonnage of the vessel, calculated in accordance with this Part, results from an alteration in
(c) the trade in which the vessel is engaged, if the alteration changes its assigned load line.
(4) Subsection (3) does not apply in respect of a vessel that
(c) is a passenger vessel that is engaged in the carriage of large numbers of unberthed passengers in a special trade such as the pilgrim trade.
