I'm looking at DFO's website, and here's what you will find about that on the website.
NASCO was established under the convention for the conservation of salmon in the North Atlantic Ocean, which came into force on October 1, 1983. NASCO uses the best scientific evidence available to promote the conservation, restoration, enhancement and rational management of salmon stocks that migrate beyond areas of fisheries jurisdiction of coastal states of the Atlantic Ocean north of 36 degrees north latitude throughout their migratory range. Canada is one of seven contracting parties to the organization.
This is what you find on DFO's website. What isn't mentioned is any indication of what the agreement is trying to achieve, how the department is progressing towards achieving those results, how it is organized to go after those results, or what's yet to be done.