Ours is just the dub work, the initial session. But the percentage of anime that's dubbed and released on video as compared to the percentage released on TV is colossal. It would still fall under the SAG agreement. I don't believe that there's a statute of limitations. When the studios purchase the rights, they have a window of time to release it on TV or in theaters.
Rights expire all the time on titles that are hot property.
So if the company wants to get it on TV but doesn't do it in time, they then have to re-bid for the title they have already done all that work on.