Part of it is to make sure a treaty can't be used to get first right in a commercial enterprise. That means defining what is in the treaty and what is not.Actually it's an article on how this will impact commercial fisheries legislation. It's commentary on legal findings, not how Admiralty law is applied to Treaties. lol.
Limited Scope of Treaty Promises
In finding in favour of Donald Marshall, the court was careful to point out that this treaty right was not without its limits. For example, in rejecting an argument that the Crown was in breach of an obligation to continue to supply licenced traders and truckhouses, the courts said “[t]he appellant cannot , with any show of logic, claim to exercise his treaty rights using an outboard motor while at the same time insist on restoration of the peculiar 18th century institution know as truckhouses.”
The court also addressed the concern that its decision “could lever the treaty right into a factory trawler in Pomquet Harbour gathering the available harvest in preference to all non-aboriginal commercial or recreational fishermen.” In doing so, it pointed out that the treaty only gave a right to trade for “necessaries”. In a modern day context, this translates into a right to earn a “moderate livelihood”. It said that a moderate livelihood “includes such basics as ‘food, clothing and housing, supplemented by a few amenities’, but not the accumulation of wealth.” It also added that catch limits that could reasonably be expected to produce a moderate livelihood at present day standards could be established by regulation.