29 CFR 18.45 : Labor (Section 0.735-1 To Parts 4908-4999) — Office Of The Secretary Of Labor (Parts 0 - 99) (Section 0.735-1 To Section 99.530) — Rules Of Practice And Procedure For Administrative Hearings Before The Office Of Administrative... (Section 18.1 To Section 18.106) — General (Section 18.1 To Section 18.59) — Official notice.

Official notice may be taken of any material fact, not appearing in evidence in the record, which is among the traditional matters of judicial notice: Provided, however, that the parties shall be given adequate notice, at the hearing or by reference in the administrative law judge's decision, of the matters so noticed, and shall be given adequate opportunity to show the contrary.