In this action, EPA and the Army jointly conclude that multiple substantive and procedural errors warrant a repeal of the 2015 Rule. With this final repeal, the agencies will implement the pre-2015 regulations, which are currently in place in more than half of the states, informed by applicable agency guidance documents and consistent with Supreme Court decisions and longstanding agency practice. The final rule takes effect 60 days after publication in the Federal Register. In December 2018, EPA and the Army proposed a new definition--Step 2--that would clearly define where federal jurisdiction begins and ends in accordance with the Clean Water Act and Supreme Court precedent. In the proposal, the agencies provide a clear definition of the difference between federally regulated waterways and those waters that rightfully remain solely under state authority.