Employment, safety
Agency rulemaking on mine dust upheld.
Earlier action in concert with another agency did not mandate a joint revision of the standard, as the joint action was an interim step based on another statutory provision. Stare decisis based on prior Article III review as well.
Substantively, the regulation is not an abuse of discretion.
http://media.ca11.uscourts.gov/opinions/pub/files/201411942.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.