Jay Leno's new bill could reshape classic car emissions rules in California

A new bill backed by comedian and car enthusiast Jay Leno could change emissions rules for classic cars in California. Known as Senate Bill 1392 or 'Leno's Law', the proposal aims to ease restrictions on older vehicles. If passed, its effects may spread well beyond the state's borders. California once allowed a rolling exemption for smog checks on cars 30 years or older. But in 2004, the rule shifted to a fixed cutoff—only vehicles from 1975 or earlier qualified. This change forced many cars from the late '70s and '80s into daily-driver testing, raising costs and making maintenance harder.

The 2026 version of the bill would limit exemptions to collector vehicles registered as such. These cars must not be used daily and should mainly appear at shows or events. Meanwhile, modern vehicles have grown cleaner, while older ones face growing legal and financial hurdles.

California's emissions policies often set a precedent for other states. If 'Leno's Law' passes, it could influence rules nationwide. As of March 2026, 12 US states—including Texas, Florida, and New York—already offer exemptions for older vehicles, though conditions vary by location. The proposed law would adjust how classic cars are treated under emissions rules. It could reduce costs for owners while keeping older vehicles on the road legally. With California's history of shaping national standards, the bill's outcome may have wide-reaching consequences.