A scene is clear when every performer on it had signed, on or before the shoot date, a release covering what they are recorded as doing — and every use it has been put to was covered, as of the day that use began, by every one of those releases. Not by most of them. By every one.
A handle and your own record reference, and nothing else. Legal identity belongs in your identity records, examined and indexed there. This register only has to know that the person on the scene is the person on the release — and a second copy of everybody's legal name is exactly what a breach would want.
A use is a scene going out in one format, on one channel, in one territory, from one date. It is judged against the release each performer had signed on that date. An amendment signed a month later widens what may happen next month. It does not reach back and cover what already went out.
Unless a performer was given at least 72 hours with the terms before signing, or an attorney, talent agent or personal manager approved the signed agreement in writing, the release can be taken back by written notice within three business days. Release applies that to every signing, and the only ways out of it are the two the rule itself names — recorded as facts with dates, not as a switch.
What a performer asked for, on what date. A rescission inside its window voids the release. A withdrawal stops anything new from that date on. A request to take a scene down is answered, not filed — and while it is open, nothing new goes out on that scene.