Remember, when somebody asks a difficult question, the easiest answer is always "IT'S THE LAW!". They know that very few people will make the effort to research the statutes and prove them to be a liar, so they are generally safe making that claim.
It doesn't matter what the issue is, whether it be brakes on a toad, leaving pets unattended, filling a propane cylinder, whatever, "It is the law, we HAVE to do it THIS way!" will usually get fewer arguments than "It is just company policy!"