37 C.F.R. § 10.47 Aiding unauthorized practice of law.
Title 37 - Patents, Trademarks, and Copyrights
(a) A practitioner shall not aid a non-practitioner in the unauthorized practice of law before the Office. (b) A practitioner shall not aid a suspended or excluded practitioner in the practice of law before the Office. (c) A practitioner shall not aid a non-lawyer in the unauthorized practice of law.
Title 37: Patents, Trademarks, and Copyrights
PART 10—REPRESENTATION OF OTHERS BEFORE THE PATENT AND TRADEMARK OFFICE
Patent and Trademark Office Code of Professional Responsibility
§ 10.47 Aiding unauthorized practice of law.

