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Jenner & Block Partner Adam Unikowsky has secured a landmark victory at the Supreme Court of the United States inChatrie v. United States, with the Court holding by a 6-3 vote that accessing a person’s location data in the cloud is a “search” under the Fourth Amendment, requiring law enforcement to obtain a warrant satisfying the Constitution’s probable cause and particularity requirements.

As part of the Occupational Safety and Health Administration’s July 1, 2025 deregulatory efforts (read our client alert summarizing the actions here), the agency proposed a series of changes to chemical-specific respirator standards affecting multiple hazardous substances including asbestos, benzene, lead, cadmium, and ethylene oxide.

Kimberly Cook, Former Senior FCC Official, Joins Jenner & Block's Communications, Internet, and Technology Practice in Washington, DC WASHINGTON, DC – May 12, 2026: Jenner & Block is pleased to announce that Kimberly Cook has joined as Special Counsel in its Washington, DC office as part of the firm's Communications, Internet, and Technology (CIT) Practice.

Under EPA’s New Source Review (“NSR”) program, an owner or operator must obtain a permit prior to commencing construction of a new major source or a major modification to an existing source. The NSR permitting process can be lengthy, often taking a year or more to complete with complex air dispersion modeling, control technology analyses, agency meetings, public participation, and other attendant requirements.

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Precious Jacobs-Perry Discusses Chance the Rapper Jury Trial Victory Jenner & Block Partner Precious Jacobs-Perry spoke withBillboard andThe American Lawyer about the firm's precedent-settingjury trial victory for Chancelor J. Bennett, best known as Chance the Rapper, in his breach of contract dispute with hisformer manager Patrick Corcoran.

Wetlands are among the most productive and protective ecosystems on our planet — filtering water, storing carbon, buffering floods, and sustaining biodiversity. They are also, since the Supreme Court’s 2023 decision in Sackett v. EPA, substantially less protected by federal law. By eliminating the ‘significant nexus’ test, Sackett shrunk federal power over millions of acres of wetlands.

As my colleague Meghan Greenfield discussed yesterday, on February 12 the Environmental Protection Agency (EPA) rescinded its 2009 finding that greenhouse gas emissions endanger public health and welfare, unwinding what it described as the legal foundation for nearly every federal climate regulation of the past fifteen years.

Under the Clean Air Act, EPA regulates six criteria pollutants through the National Ambient Air Quality Standards (“NAAQS”) program. EPA sets primary and secondary NAAQS that states must meet through regulation of stationary and mobile sources. The Clean Air Act requires EPA to review the NAAQS at least every five years and revise the standards as appropriate.

In what it described as “the single largest deregulatory action in US history,” the Environmental Protection Agency (EPA) on February 12 repealed its finding under the Clean Air Act that greenhouse gas emissions endanger public health and welfare—the so-called “endangerment finding.”[1] The decision eliminates not only federal greenhouse gas emission standards for vehicles and engines from model year 2012 forward, but also the legal foundation for almost all federal climate regulation.