BornLate - you were really born late, and don't have a clue about how complicated things can get. Regulations aren't consistent. They can differ not
only state by state, but county by county, and even city to city. And I can guarantee you that some people whom you think have it all figured out are
really a website checkout octopus having a vast number of tentacles into many different businesses, some of whom don't give a damn about the laws.
Rules can even differ with occupation. For example, nobody but ambulance drivers seems to take account of how many women asphyxiate in nail salons (quite a few do); but if I tried to sell a jar of typical nail polish in a paint store, it could levy a $75,000 fine per incident because its considered carcinogenic and flammable (which it is). But I guess the cosmetics industry has some good lobbyists. More likely, they're not even factoring in human health (EPA's role) but the fact that cabinet shops used to spray lacquer in quantity and blow up entire buildings (seen that happen more than once in this very area). So it's a fire dept and air resources board issue instead. We used to keep on staff a full time librarian just to keep pace with all this the paperwork, forms, and required record-keeping, including thousands of MSDS sheets. Nowadays MSDS data can simply be downloaded on demand by anyone, but the regulations have perhaps gotten even more tangled. Ironically, everyone, including manufacturers, would prefer stricter
rules that are consistent nationwide, so they didn't have to constantly re-tweak ingredients to match specific localized labeling requirements.