The Series 66, also known as the Uniform Combined State Law Examination is an exam and license meant to qualify an individual to provide investing and general financial advice to clients. The Series 66 qualification exam covers economic factors and business information, investment vehicle characteristics, client/customer investment recommendations and strategies, laws, regulations, and guidelines including prohibition on unethical behavior. 

To register as an Investment Adviser Representative (IAR) based on the Series 66, individuals must also have passed the FINRA Series 7 exam, and that registration must be active.