The AAMVA Code Dictionary (ACD) is a set of codes used nationwide to identify:

• The type of driver conviction or
• The reason for a driver withdrawal

ACD codes are used in messages sent over AAMVAnet, which is AAMVA's proprietary, secure computer network that connects to each state driver licensing agency (SDLA) in the 50 U.S. states and the District of Columbia.

The AAMVA ACD manual provides information about the business rules for using the ACD code set in the State Pointer Exchange Services (SPEXS) and in the Problem Driver Pointer System (PDPS). The manual also lists all ACD codes with corresponding descriptions and abbreviations as approved by AAMVA and implemented by each state driver licensing agency in the jurisdictions.

Program Leadership

The ACD is supported by the ACD Subcommittee (formerly Working Group), who examines and updates the dictionary set of codes used nationwide by driver licensing authorities. To learn more about the group, visit the ACD Subcommittee page.

Education and Training

AAMVA offers informational webinars and training courses related to the ACD, including:

• On demand ACD basic courses
• On demand ACD advanced courses

You can also visit our search page to find a list of all ACD events. Once on the page, please use the filters on the left side to access the desired "Event Type."

For a comprehensive list of all systems trainings and learning opportunities, visit our Webinars and Training page.