The problem is that the manufacturer has an incentive to lie, and we don't have a good way to outright blacklist companies that aren't in the US that do that, s

The problem is that the manufacturer has an incentive to lie, and we don't have a good way to outright blacklist companies that aren't in the US that do that, so we need to have multiple levels of testing, ideally at least one from someone who doesn't have an incentive to lie.