This joint resolution would overturn an Environmental Protection Agency rule approving Montana's air quality plan for reducing regional haze pollution during the second implementation period (2025 Federal Register, November 28, 2025). The measure uses the Congressional Review Act, which allows Congress to disapprove federal regulations within a specified timeframe. If passed by both chambers and signed by the President, the EPA rule would be nullified and prevented from taking effect. The resolution would affect air quality standards in Montana and potentially impact industries regulated under the regional haze requirements, which typically target emissions from power plants and other major industrial sources. Senator Whitehouse introduced the resolution, and it was referred to the Senate Committee on Environment and Public Works for consideration.