There's something almost comedic about regulators amending a rule for engines that don't exist yet. The heavy-duty NOx standards finalized back in December 2022 don't even take effect until model year ...
The proposal doesn't change the tougher NOx standard, but it would revise key implementation requirements that manufacturers ...
The long-awaited proposed changes in a set of EPA heavy-duty truck regulations that loosely is referred to as “the NoX rule,” ...
EPA is expected to release a draft of its long-awaited notice of proposed rulemaking on changes to NOx tailpipe emissions ...