Basically the California law requires that said label be placed on any manufactured object that might possibly contain any of a very large list of potentially carcinogenic substances, UNLESS (and here's the kicker) the manufacturer specifically has test results showing that it DOES NOT. As a result, the vast majority of manufacturers, unwilling to eat up all their profits in proving a negative, simply slap the label on and proceed. Naturally, what this means is that these labels are omnipresent, thus universally ignored, thus totally meaningless, just like backup beepers on heavy equipment and car alarms in the city. But legislators and lawyers don't seem to have the ability to foresee unintended consequences, that any reasonably alert chihuahua possesses. I mean, let's face it, they're the ones that couldn't hack 10th grade math.