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43 C.F.R. § 45.34 — What is the law governing ex parte communications?

(a) Ex parte communications with the ALJ or his or her staff are prohibited in accordance with 5 U.S.C. 554(d). (b) This section does not prohibit ex parte inquiries concerning case status or procedural requirements, unless the inquiry involves an area of controversy in the hearing process.

Official source: www.ecfr.gov