Efforts by public health and law enforcement officials in recent years have had a substantial impact on reducing youth access to cigarettes through retail stores, leading to growing concern over youth access to cigarettes from Internet cigarette vendors (ICVs). This has led some states to pass legislation governing Internet tobacco sales to minors. California Business and Professions Code § 229631 (BP § 22963) is currently one of the most stringent ICV youth access laws because it requires vendors to comply with 6 provisions designed to reduce youth purchases of cigarettes via the Internet. This study, unlike others that have assessed compliance with existing state laws regulating retail store cigarette sales, assessed vendor compliance with a new state law specifically regulating Internet cigarette sales.