Robert's question is really two questions: 1) Would a ruling invalidating DOMA Sec. 3 be retroactive? 2) Even if so, might there be procedural obstacles to using the decision, such as the statute of limitations, etc.?As to 1), in general, when the SCOTUS invalidates a law as unconstitutional, that ruling applies to other similarly situated persons, so there would be a class of people who are marri