Since 1973, the Armstrong-Indiana-Clarion Drug and Alcohol Commission, Inc. (AICDAC) has been the designated Single County Authority (SCA) for drug and alcohol services in Armstrong and Indiana Counties. In 2010, Clarion County was added to the counties serviced in the state of Pennsylvania by AICDAC.

In the role as the Single County Authority (SCA), through AICDACs contract with the Department of Drug and Alcohol Programs, AICDAC receives, administers, and allocates federal, state, and local drug and alcohol funds to facilitate the provision of a comprehensive and balanced system of quality substance abuse prevention, treatment, and case management services in the three-county area.

The Commission is responsible for assessing needs, planning, developing, and coordinating programming to meet the drug and alcohol service needs, and then monitoring and reviewing the outcome of these interventions.