29 C.F.R. § 18.1004 Admissibility of other evidence of contents.
Title 29 - Labor
(a) The original is not required, and other evidence of the contents of a writing, recording, or photograph is admissible if: (1) Originals lost or destroyed. All originals are lost or have been destroyed, unless the proponent lost or destroyed them in bad faith; or (2) Original not obtainable. No original can be obtained by any available judicial process or procedure; or (3) Original in possession of opponent. At a time when an original was under the control of the party against whom offered, that party was put on notice, by the pleading or otherwise, that the contents would be a subject of proof at the hearing, and that party does not produce the original at the hearing; or (4) Collateral matters. The writing, recording, or photograph is not closely related to a controlling issue. (b) [Reserved]
Title 29: Labor
PART 18—RULES OF PRACTICE AND PROCEDURE FOR ADMINISTRATIVE HEARINGS BEFORE THE OFFICE OF ADMINISTRATIVE LAW JUDGES
Subpart B—Rules of Evidence
Contents of Writings, Recordings, and Photographs
§ 18.1004 Admissibility of other evidence of contents.