So long as state law stipulates that 1. MJ users must be at least 21 years of age (regardless of "medicinal" terminology), 2. It is regulated as Alcohol for purposes of work and driving, 3. Persons in jobs of sensitivity (eg. Medical, public safety, construction, those involving driving as a part of their job requirement) are prohibited from use within 8hrs of working, 4. Black market/unauthorized sales/distribution/purchasing is classified as a federal felony offense AND state felony offense in accordance with illicit production and distribution of alcoholic beverages such as "moonshine". As long as these requirements are met, the usage of MJ by persons under state laws should be unregulated by the Federal government.