The lady was also a resident of Oregon when she started her groupie excursion with Aerosmith. I would imagine she would have to prove to the court that crimes occurred within California, not just that crimes occurred.
Aeosmith's tour dates shouldn't be hard to track down, but finding testimony to declare that Tyler was absoloutely schtupping or drugging this once young lady while they were on the California legs of the tour or wherever they were residing in between gigs (presumably California).
But this is clown world, so maybe the strength of the allegations is more important than legal precedent or demonstrable proof.
I feel obligated to also note that I absolutely believe her allegations, Tyler basically admitted the whole thing in interviews and in a biography, and the lady has had a consistent story about the events for decades. Whether that gets a judgement, a settlement, or a conviction, that's all up to whatever the whims of the legal system happen to be these days in clown world.