late Middle English (in the sense ‘control by rules’): from late Latin regulat- ‘directed, regulated’, from the verb regulare, from Latin regula ‘rule’.
I’m not going to do your homework for you. It shouldn’t take much.
It is self-evident when you read the very text of the 2nd.
They used “regulated” in a completely different sense than the word is used today, or in middle english or whatever you’re digging up.
Ask yourself this. Provided you agree that a militia is “necessary to the security of a free state”, what would be the characteristics and attributes of that? A bunch of rules and bureaucratic BS? Of course not.
A well trained, a well functioning unit. Think drill and ceremony, if you’ve ever served in the military. A moment’s thought on this by anybody makes it clear what they meant. It isn’t even debateable, except of leftist wankers.