You’re right about the yellow fringe representing maritime law. Years ago, people understood the significance of that and you never saw American flags with yellow fringe for that reason.
The above article is pretty fascinating and rekindles a thought I had neglected for some years ... that it is the little things that establish large law/practice/actions.
Kind'a like, "the Lord helps those that help themselves" which I thought was in the bible ... 'till I read it.