The board may not act on its own motion or on any complaint received by the board in which an allegation of unprofessional conduct or any other violation of this chapter against a professional who holds an Arizona license occurred more than four years before the complaint is received by the board. This time limitation does not apply to:

1. 1. Medical malpractice settlements or judgments or allegations of sexual misconduct or if an incident or occurrence involved a felony, diversion of a controlled substance or impairment while practicing by the licensee.
2. 2. A board's consideration of the specific unprofessional conduct related to a licensee's failure to disclose conduct or a violation as required by law.