The contracting parties, the member countries of NAFO, conduct the scientific research. They pay the bills.
In Canada's case, for example, we have large-scale ecosystem surveys that cover the Canadian continental shelf and the areas outside the 200 miles. Canada would be a heavy contributor to the NAFO science, as would some of the other contracting parties. The European Union, for example, also conducts surveys in the regulatory area and would pay for that research as well. Some of this is done jointly with other contracting parties such as Canada.
As I say, the Scientific Council is not a research organization per se. It has no funding for research. But the contracting parties bring their research to the table. It's discussed openly. If there are things that need to be done, for example, the Scientific Council is free to make recommendations that the countries can then take back and make a decision on in terms of whether they can be added to the research programs.
The Scientific Council also provides a forum for a discussion of the different research, and it allows for coordination and collaboration where possible.
The short answer is that it's paid for by the member states of NAFO.