That law won't mean much when people are importing products from other jurisdictions that don't have that law... Which is essentially what happened here. (The broken "law" being the exclusivity agreement).
And if we assume that complying with the law somehow increases costs in the US market, people will still go buy the cheaper thing anyway. Which means you need to enforce the regulations on importing these things just as strictly as we regulate the import of cigarettes...
And if we assume that complying with the law somehow increases costs in the US market, people will still go buy the cheaper thing anyway. Which means you need to enforce the regulations on importing these things just as strictly as we regulate the import of cigarettes...