Are you sure the law requires "frames" and not just removable comb for inspection?
If I read your comments, your asking about what many call a "trench" style hive. This work great, as long as the beekeeper adapts the management of the hive to horizontal movement of the bees. (Like bees going to one side in winter and starving away from honey stores, etc.)
I cut my sides off completely. While I have had bees work boxes below and above an inner cover utilizing nothing more than the hole, I'm pretty sure the bees would of been better off with the whole inner cover removed from the middle of the hive. Same with removing the entire sides of boxes to make up the trench hive.
Here is some information....http://www.bjornapiaries.com/uniquebeekeeping.html