No attorney, certified public accountant, or enrolled practitioner may, with respect to any matter administered by the Bureau, take acknowledgements, administer oaths, certify papers, or perform any official act in connection with matters in which he or she is employed as counsel, attorney, or practioner, or in which he or she may be in any way interested before the Bureau.
(26 Op. Atty. Gen. 236)
31 C.F.R. §8.38