Administrative law
Interstate council not subject to statutory or APA suit -- although inaction is "backstopped" by the Agency, the action and inaction of the council isn't actionable under Agency-based rights of action.
https://www.cadc.uscourts.gov/internet/opinions.nsf/E0161B8D8499099885257F3100533D5A/$file/14-5304-1591775.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.