The Obama administration is expected to face a lawsuit by industry groups and states challenging its new rules aimed at cutting power-plant emissions.
The lawsuit against the Environmental Protection Agency is expected to be filed in a matter of weeks, The Wall Street Journal is reporting, adding that it is new territory for the courts.
The new regulations were issued last week by the federal agency as part of the Clean Air Act, under a section of the law that is seldom used.
At issue is a section written in 1990, when the 1963 law was updated by Congress, but it includes language that has different wording from both the House and Senate amendments that are important to the enactment of the EPA rules. The courts must make their decision based on this section.