Opponents of the Trump administration’s new definition of which waterways and wetlands are protected under the Clean Water Act have lined up in court to make their grievances known.

Don’t expect clarity on the rules anytime soon.

The Trump administration’s Navigable Waters Protection Rule is already on hold in one state — Colorado — and could still be frozen by any one of the various federal judges who are now examining the regulation. Unlike lawsuits over Clean Air Act rules, which land in the U.S. Court of Appeals for the District of Columbia Circuit, Clean Water Act challenges can be heard in any of the nation’s nearly 100 federal district courts.