Can subject matter jurisdiction be raised at any time?

QUESTION(S) PRESENTED L Can subject matter jurisdiction be raised at any time? Il. Is an issue of subject-matter jurisdiction subject to the one-year limitation proscribed by the Antiterrorism and Effective Death Penalty Act (AEDPA) as held by the Tenth Circuit? III. | Do unpublished opinions supersede decades of published Supreme Court precedent as recently used by the Tenth Circuit? IV. Is due-process circumvented by the AEDPA? V. Is a judgment entered by a court which is void of subject-matter jurisdiction a valid and lawful judgment as recently held by the Tenth Circuit? i