Except as provided in subsection (b) of this section, a health occupations board may not bring charges against a licensee or certificate holder based solely on events contained in a complaint the board receives more than 6 years after: The day the complainant actually discovered the facts that form the basis of the complaint; or The day when a reasonable person exercising due diligence should have discovered the facts that form the basis of the complaint. This section does not apply to a complaint based on: Criminal convictions or sexual misconduct or other similar boundary violations; Reciprocal discipline matters; Ongoing substance abuse; Fraudulent concealment of material information; or Acts that occur while a patient is a minor.