Yes, because individual circumstances can change in ways that might impact a person's ability to responsibly handle classified material — anyone who has an access authorization must be reinvestigated. Executive Order 12968 and its implementing documents require that individuals who hold a Q access authorization, or a Top Secret clearance, must be reinvestigated at least every five years. Someone who holds an L access authorization, or a Secret clearance, will be reinvestigated at least every 10 years. However, your agency or company is not required to wait five to 10 years before conducting the reinvestigation — a reinvestigation may be initiated at any time if the individual's conduct raises a security concern. For example, if an individual is arrested or frequently violates security procedures, or they have a repeated a pattern of conduct, such as drug use or financial issues, his/her actions might impact his/her continued eligibility for access to classified information.