I would not assume it, but if a double rook rifle was originally regulated, likely well done liners would at least point were the original maker intended. As mentioned, lining a single barreled gun might be more likely. I'd fully expect a lined barrel to be minute of tin can all day long.

I think it's not so difficult to find a gunsmith that will do quality lining jobs, at reasonable prices. I don't believe it's anywhere near the value disappointment sleeving tends to be.