On August 17, 2018, the U.S. Court of Appeals for the D.C. Circuit Court issued its decision vacating a June 2017 EPA rulemaking. The June 2017 rule delayed the effective date of the January 2017 Risk Management Program regulatory requirements (known as the RMP Amendments rule).
The purpose of the delay was to provide time to consider petitions for reconsideration of the RMP Amendments rule and take further regulatory action which included proposing a rule to revise or rescind these amendments.
On September 21, 2018, the U.S. Court of Appeals for the D.C. Circuit Court issued its mandate which makes the 2017 RMP Amendments rule now effective.
For more information: https://www.epa.gov/rmp/risk-management-plan-rmp-delay-rule-vacatur