What is the test for a habeas petition challenging a prison disciplinary action?

In general, a habeas petition challenging a prison disciplinary action no longer presents such a case or controversy, and therefore becomes moot, when the punishment for the action has been withdrawn or completed at the time of the petition. See Wilson v. Terhune, 319 F.3d 477, 479, 481-82 (9th Cir. 2003). Where the petitioner can show that so-called "collateral consequences" flow from the disciplinary action (i.e., circumstances beyond the punishment imposed that constitute an actual injury), however, the case remains justiciable. Id. at 479-80;

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