>If a locality can enforce its local tax laws, what other custom crafted local laws can it enforce in return for access to customers? Should it be allowed to en

>If a locality can enforce its local tax laws, what other custom crafted local laws can it enforce in return for access to customers? Should it be allowed to enforce its local environmental and labor standards as well? This is pretty much what happens with California and car manufacturers. Even today on certain aftermarket car parts (primarily exhaust systems), there are explicit notices that they are legal anywhere in the US except California.