More information on each type of drug or alcohol charge are available on their corresponding pages.  Just click on their penal code section (PC number). You will be able to see the elements of the crimes (things the prosecutor needs to prove beyond a reasonable doubt), the list of potential defenses to such charges, and the exposure. Exposure means the penalties or punishment for each crime or charge.

Public Intoxication/Drunk in Public, PC 647(f)

Minor in Possession of Alcohol, Business & Professional Code 25662

Driving Under the Influence of Drugs or Alcohol (DUI), VC 23152

Furnishing Alcohol to an Underaged Person (18-20 year olds), Business and Profession Code (B&P) 25658(a)

Furnishing Tobacco Products to a Minor, PC 308(a)

Possession of a Controlled Substance, HS 11350(a)

Possession of a drug paraphernalia, HS 11364(a)

Possession of Non-Narcotic Controlled Substance, HS 11377(a)