Vehicles: driving under the influence.
What changed between versions
Creates a new tier for DUI offenders with 4 or more prior convictions within 10 years: mandatory felony punishable by 16 months or 2 or 3 years in county jail, with 5-year license revocation and 48-month ignition interlock device requirement.
Changes the penalty for DUI with 2 prior convictions within 10 years from a fixed misdemeanor (120 days to 1 year) to a wobbler that can be punished as either a misdemeanor or a felony (16 months or 2 or 3 years).
Splits the existing rule for 3+ prior DUIs into two separate tiers: 3 priors remains a wobbler with 4-year revocation and 36-month interlock, while 4+ priors becomes a mandatory felony with 5-year revocation and 48-month interlock.
Adds new Vehicle Code sections 23550.1 and 23552.1 to create the statutory basis for the new penalty tiers, and incorporates conforming changes from AB 1830 to Sections 23546, 23550, and 23550.5.
Extends the ignition interlock device mandatory term from a flat 36 months for all repeat offenders to a tiered system: 36 months for 3 priors and 48 months for 4 or more priors within 10 years.