On November 19, 2014, the Environmental Protection Agency (EPA) proposed amending certain reporting requirements in the National Emission Standards for Hazardous Air Pollutants: Coal- and Oil-Fired Electric Steam Generating Units (Mercury and Air Toxics Standards (MATS)) rule. This final rule amends the reporting requirements in the MATS rule by temporarily requiring owners or operators of affected sources to submit certain required emissions and compliance reports to the EPA through the Emissions Collection and Monitoring Plan System (ECMPS) Client Tool, and the rule temporarily suspends the requirement for owners or operators of affected sources to submit certain reports using the Compliance and Emissions Data Reporting Interface (CEDRI).