10 (1) A personal flotation device or lifejacket that is required by these Regulations, if it is of an inflatable type, shall be worn by a person in an open vessel or, if the vessel is not open, shall be worn when the person is on deck or in the cockpit.
https://laws-lois.justice.gc.ca/eng/regulations/SOR-2010-91/page-2.html#h-769486