That is a very good approach.
I am thinking, however, that answers to your questions maybe incomplete and include a lot of "Usually- but not always" and "Should- but does not really need to- well...not always" type quantifiers.
At the end of the day, movie sets don't seem to operate like military firing ranges where everything is always done according to very set procedures and under a very clear chain of command regarding weapons.
Rather, sets seems to operate under varying definitions of what is, or is not fundamentally safe and also have varied rules regarding the use of weapons and who is permitted to handle them besides the armorer, and who can over ride who regarding weapons.
And of course, some set rules might be written down, others maybe customary or be derived from a "common understanding", and still others subject to change based on alot of factors.