On November 15, 2021, the EPA proposed new source performance standards and emission guidelines for crude oil and natural gas facilities. (86 FR 63110). This action was in response to the January 20, 2021, Executive Order titled "Protecting Public Health and the Environment and Restoring Science to Tackle the Climate Crisis." The 2021 action proposed to update and strengthen methane and VOC standards on the books for new sources, add standards for currently unregulated new sources, establish first nationwide Emission Guidelines for states to regulate existing sources. On December 6, 2022, in a supplemental proposal, EPA proposed to update, strengthen, and expand its November 2021 proposal that would secure major climate and health benefits for all Americans by reducing emissions of methane and other harmful air pollution from both new and existing sources in the oil and natural gas industry (87 FR 74702). The supplemental proposal would achieve more comprehensive emissions reductions from oil and natural gas operations by improving standards in the 2021 proposal and adding proposed requirements for sources not previously covered. Specific proposed requirements include fugitive emissions monitoring and repair at well sites, stronger requirements for flares, zero emissions standards for pneumatic pumps, new standards for dry seal compressors, and a program to allow approved third parties to identify super-emitting events for prompt mitigation. The supplemental proposal also promotes innovation in methane detection technology. The proposal included details for implementing the Emissions Guidelines, which would require states to develop plans that establish, implement, and enforce performance standards for hundreds of thousands of existing sources across the country. State requirements must generally reflect the reductions achievable by applying the Best System of Emission Reduction that EPA has determined has been adequately demonstrated. States would have to submit plans including their requirements to EPA for review. The Agency expects to issue a final rule later this year.