California air quality rules get a cleanup, removing old requirements

The US environmental regulators are proposing to update air quality rules for California's Mojave Desert. This means outdated or rescinded rules will be officially removed from the state's air quality plan.

Air quality rules often accumulate over decades, with new regulations layered on top of old ones. This proposal is a bureaucratic cleanup, removing rules that are no longer relevant or have been replaced by newer, more effective ones. It simplifies enforcement by ensuring regulators and regulated industries are working from the most current set of requirements.