37 CFR §11.803

1. (a)A practitioner who knows that another practitioner has committed a violation of the USPTO Rules of Professional Conduct that raises a substantial question as to that practitioner's honesty, trustworthiness or fitness as a practitioner in other respects, shall inform the OED Director and any other appropriate professional authority.
2. (b)A practitioner who knows that a judge, hearing officer, administrative law judge, administrative patent judge, or administrative trademark judge has committed a violation of applicable rules of judicial conduct that raises a substantial question as to the individual's fitness for office shall inform the appropriate authority.
3. (c)The provisions of this section do not require disclosure of information otherwise protected by § 11.106 or information gained while participating in an approved lawyers assistance program.