They are discretionary to a certain extent, in the sense that the government could decide not to settle these claims for a number of years. But at one point, it will likely become unavoidable to settle these claims, either by negotiations or—more likely, if the government were to not want to address these issues—through the courts.
There's some element of discretion when it comes to the timing of these claims, but not that much discretion for the settlement of the claims themselves. The discretion is with timing.