Concerning impaired driving.

This bill lowers Washington's legal blood alcohol limit for DUI convictions from 0.08 to 0.05 within two hours of driving, and sets a THC concentration threshold of 5.00 or higher for cannabis impairment. It applies to all drivers operating vehicles in the state, directly affecting anyone found driving under the influence of alcohol, cannabis, or drugs. The bill creates new defenses allowing defendants to prove they consumed alcohol or cannabis *after* driving but *before* testing, if they notify prosecutors early. It also adjusts penalties, making certain repeat offenses or severe cases (like vehicular homicide) punishable as class B felonies.