Collection Plans: Why do plans tied to a work order completion transaction with no triggers specifie

We've got a collection plan defined and it is tied to a work order completion transaction but there are no triggers specified. I would expect that it could be entered for any work order which makes sense.

I'm wondering why when I go and query an asset, I can view and enter data for that plan on any asset as well. I'd think that only an asset query transaction would tie plans to an asset, not a work order completion transaction.

Am I missing something?

On that same thread, what does it mean for an Asset Query transaction to be mandatory. There's not really a way to enforce a query like you can enforce something at work order or operation completion.