The FCC always enforces the non-com rules on stations. Just last year they fined WBAI for breaking their non-com rules. There have been several fines imposed over the years. But this is a targeted investigation aimed strictly at NPR and PBS, not anyone else. It doesn't include American Public Media, for example, or other national program suppliers. It doesn't include Pacifica or other independent non-coms. This investigation, at least as outlined in this letter, is targeted at these two organizations that the FCC doesn't regulate. The letter was then sent to congress with the intent to defund these two organizations. The problem is that congress doesn't fund NPR or PBS directly. The money goes to CPB, and CPB was completely left out of the loop. So this letter is a big legal problem for the FCC on many fronts. If I'm a civil servant in the enforcement division, I'm completely blind-sided by this, and at a loss as to how to carry this out.
The other problem the FCC has is enforcement. As a result of the Supreme Court's Chevron decision last year, there's a big question about the ability of a government agency to impose fines. In fact, Commissioner Nathan Simington has refused to approve any FCC fines on stations or pirates citing the Chevron decision. None of the other commissioners signed on to this letter. I wonder how they plan on enforcing whatever conclusions they reach.