Does OSHA have the authority to set “reasonably necessary or appropriate” workplace-safety standards?

The United States Court of Appeals for The Sixth Circuit says it does.  More than fifty years ago, Congress passed, and President Nixon signed into law, the Occupational Safety and Health (OSH) Act, 29 U.S.C. § 651 et seq. Throughout the next half century, challenges to the constitutionality of the Act have been uniformly rejected....