In November 2021, the U.S. Environmental Protection Agency (EPA) and the Army Corps of Engineers announced they’d come up with a proposed revision for the definition of “waters of the United States” (WOTUS), They published the proposal in December 2021, with a promise to finalize it by the end of 2022. That they did, and on 30 December a final version was issued. It is scheduled to go into effect in 60 days – around 1 March 2023.  Defining WOTUS has been a long and winding path through many federal courts, and this new rule might be upended by yet another pending case. The Obama Administration had issued new WOTUS rules in 2015. At issue was the rule’s scope under the Clean Water Act’s jurisdiction...