Of course, we do the stock assessments, which are based on two surveys and a collection of data from the commercial catches. It goes through an age-based assessment.
The biomass is estimated at the beginning of the year. It's basically just a fixed point in time. The biomass is basically estimated from a model. They assume certain natural mortality and stuff like that, of course, over the year. It's fairly standard stuff.
The catches are monitored. When a vessel comes to harbour, the catch has to be weighed by the authorities there, the directorate of fisheries, which monitors them. They are also of service from both.... There's not 100% coverage, far from it, actually. The coast guard sometimes enters vessels and is the law enforcement along with the fisheries directorate.
You have to land in a legal harbour, so to say, or in a registered harbour, and have the catch weighed. There are various bookkeeping checks that are run routinely to check whether the amount you report for exporting is the same as the amount you landed, and so on.