This product--developed by NASBLA's ERAC in 2016 and updated in 2025--is geared toward helping officers/investigators in the process of determining and accurately recording alcohol or drug involvement as a contributing factor to an incident (with or without physical evidence), as legal impairment (BUI, OUI, etc.), or as a result of reasonable suspicion without physical evidence. Click here for the guidance, which includes a set of questions to pose about the operator and occupants or others involved in the incident.