California's 'Leno's Law' Could Free Classic Cars from Smog Checks in 2026

A revised bill aiming to ease emissions rules for classic cars in California is making progress in 2026. Known as 'Leno's Law', the proposal seeks to exempt older vehicles registered as collector items from modern smog checks. Supporters argue the changes would help preserve vintage cars while keeping them road-legal under stricter environmental rules. California once allowed a rolling exemption for smog tests on cars 30 years or older. But in 2004, the state replaced this with a fixed cutoff, only excusing vehicles from 1975 or earlier. Since then, owners of classic cars have faced rising costs to meet modern emissions standards.

The new bill, Senate Bill 1392, takes a stricter approach than a failed 2025 attempt. It limits exemptions to cars not used for daily driving, focusing instead on those driven mainly for shows or special events. Backers, including comedian and car enthusiast Jay Leno, argue the law would protect vintage vehicles without undermining air quality goals. Across the US, around 15 to 20 states already offer some form of emissions exemption for older cars. Rules vary widely—Montana and Wyoming exempt all vintage vehicles, while California remains one of the strictest. If passed, the bill could set a precedent, encouraging other states to adopt similar measures.

The 2026 version of the bill has a clearer focus than its predecessor, which stalled over cost concerns. If approved, it would mark the first major update to California's classic car emissions rules in over two decades. The outcome could shape how other states balance environmental regulations with the preservation of automotive history.