The Drug Evaluation and Classification (DEC) Program forms the basis of drug-impaired driving enforcement through training and certifying Drug Recognition Experts (DREs). The DRE responds to identify and collect vital evidence, which is often times short lived, store it through a written record, and interpret it to identify the drug category or categories responsible for the impaired driving.

These documents provide police agencies with guidelines and procedures for establishing and maintaining a DEC Program. The Considerations document and accompanying Concepts & Issues paper address the efficient use of DREs so that these specially trained officers can provide a highly effective means of identifying and apprehending drug-impaired individuals to identify and assist with the prosecution of drug-impaired drivers or other criminal incidents involving drug-impaired individuals.