Page 2575 of the House ways and means on tariffs "a clear havana, of course, must be all havana leaf, outside cover and all."
I yanked that right out of my ass, right there. I wanted to check and see if there was more than one definition, but that's as far as I got cause I have to leave.
I understood that clear havana's were made in locked down factories under government employee supervision in order to gain certification as clear havana. If the goverment dude that unlocked the door didn't show up, cigars weren't produced that day.
Maybe the way they were made at some later time was changed, but that's the essence of how they were produced for years.