What Are the California DUI 1st Offender Class Requirements? The California DUI 1st Offender Class requirements depend on your blood-alcohol level at arrest: a 3-month, 30-hour program for a BAC under 0.20%, or a 9-month, 60-hour program for a BAC of 0.20% or higher, or a chemical test refusal, under California Vehicle Code § 23538. Most California courts now accept online enrollment. Read More: https://sites.google.com/view/california-online-cout-courses/blog/what-are-the-california-dui-1st-offender-class-requirements