No person, including licensees of the Boards of Counseling; Medicine; Nursing; Psychology; or Social Work, shall claim to be a certified sex offender treatment provider unless he has been so certified. No person who is exempt from licensure under subdivision 4 of §§ 54.1-3501, 54.1-3601 or § 54.1-3701 shall hold himself out as a provider of sex offender treatment services unless he is certified as a sex offender treatment provider by the Board of Psychology.