S.J. Res. 121 is a joint resolution that would overturn an EPA rule extending deadlines for oil and natural gas companies to comply with climate-related emissions standards. The EPA rule, published in December 2025, gave companies additional time to meet performance standards for new and modified facilities and to comply with emissions guidelines for existing sources. If passed, this resolution would eliminate the EPA's deadline extensions and reinstate the original compliance timeline, effectively forcing oil and natural gas operators to meet the stricter emissions standards on their original schedules. The resolution uses Congress's authority under federal law to disapprove regulations issued by executive agencies. No specific funding is mentioned in the legislation, as the resolution simply seeks to void an existing rule rather than appropriate new resources.