Providing for congressional disapproval under chapter 8 of title 5, United States Code, of the rule submitted by the Department of the Army, Corps of Engineers, Department of Defense and the Environmental Protection Agency relating to "Revised Definition of 'Waters of the United States'".

HJRES 27 is a congressional resolution seeking to block a federal rule that redefined which waterways fall under the Clean Water Act's protections. It targets a rule submitted by the Army Corps of Engineers, Department of Defense, and Environmental Protection Agency (EPA) on January 18, 2023, which aimed to revise the "Waters of the United States" definition. The resolution would formally disapprove this rule under a specific federal procedure (Chapter 8 of Title 5), preventing it from taking effect. This would directly affect how federal agencies regulate pollution and development near water bodies, including wetlands and smaller streams.