The Administrative Procedure Act allows only three remedies for discovery abuse in the course of an administrative proceeding. First, the requesting party may file a motion before the ALJ conducting the proceeding to compel the discovery. (Gov. Code, 11507.7(a).) Second, that party may request monetary sanctions from the supervisor ALJ, managing the regional ALJ office. (Gov. Code, 11455.30(a).) Third, the requesting party may in some circumstances seek a contempt sanction. (Gov. Code 11455.10(a).) The APA, however, does not permit the supervisor ALJ to bar a non-compliant expert witness from giving testimony at the hearing another ALJ conducts, as occurred here.