I am aware of both unit-level turn-arounds and council-level event turn-arounds. If you can’t release the scout to whomever is there to pick him or her up (i.e. they’re not on the form), how do they get back from the event, and what are the event organizers to do with them in the interim?
The first sentence indicates to me that the assumption of the Part A form is that the parent/guardian is bringing the scout to and from events. However, if that’s not the case, then the alternate person should be designated on that form.
For example, at OA events which are conducted under council auspices, we collect a Part A & B from every participant, as well as any event-specific permission slip if needed, upon arrival. The A is retained for records at the end of the event and the B is returned to the participants when they check out. I’m used to this at all of our council and district in-person events. I don’t know if it’s council policy or national policy, but I’ve seen it at most if not all of the events I’ve attended.
Generally, for our unit we have one Part A & B that is retained by a designated person. Each person coming, if they aren’t going to be picked-up by whomever is listed on the previously submitted Part A form, needs at least a new Part A for that event.