We can legally swap whole leaf because that is considered an agricultural product. Any manipulation of the leaf, even just removing the midrib or adding flavorants makes the leaf a tobacco product subject to federal law, regulations and taxes. According to BATFE website I can't even give away a cigarette from my own home grown without the feds expecting their share of the taxes on the value of that cigarette. They don't play around with taxes on tobacco. I'm not sure about cigars, it's not as regulated as cigarettes because some congressmen smoke cigars.