By a letter dated March 13, 2017, the Administrator announced the convening of a proceeding for reconsideration of the final rule that amends the chemical accident prevention provisions addressing Risk Management Programs under the Clean Air Act published in the Federal Register on January 13, 2017. The effective date of these regulations had been March 21, 2017. By this action, the EPA is administratively staying and delaying the effective date of this rule for 90 days. Thus, the January 13, 2017 rule will become effective on June 19, 2017.