From the transcript

In a single year, we have patchy coverage in a single year, but we're trying to build up comprehensive coverage over a relatively short period of time. But we didn't have the resources to sample every area that we targeted. We had done 3 of the 4 charter regions in 3A, 1 in 3B out of 5, and this charter region in 4A, which we had not sampled since 2019. We did not get— again, we had difficulty getting a viable bid for 4B or any kind of bid for 4B, and we did not sample it in 2026. 4B is also considered a biological region, which Ian's probably talked about in his presentations.