I’m pretty sure in this format if you’re down on the shot when the clock runs out you’re okay you just can’t stand back up or then it’s a foul but I could be wrong.
I believe it’s different than it is now. The cue ball doesn’t need to be struck just addressed before 00. Once addressing ball you can’t stand up. But I did see one time where Shaw went to grab his extension and really had not addressed the cue ball before time was up.