(a) The present regulations, unless expressly
provided otherwise, do not apply to:
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(i) Ships of war and troopships.
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(ii) Cargo ships of less than 500 gross tonnage.
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(iii) Ships not propelled by mechanical means.
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(iv) Wooden ships of primitive build.
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(v) Pleasure yachts not engaged in trade.
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(vi) Fishing vessels.
(b) Except as expressly provided in chapter V, nothing herein shall apply to ships
solely navigating the Great Lakes of North America and the River St
Lawrence as far east as a straight line drawn from Cap des Rosiers
to West Point, Anticosti Island and, on the north side of Anticosti
Island, the 63rd meridian.