5 CFR 1820.19: Restrictions that apply to released records.

(a) The General Counsel may impose conditions or restrictions on the release of official OSC records and information, including the requirement that parties to the proceeding obtain a protective order or execute a confidentiality agreement to limit access and any further disclosure.

(b) If the General Counsel so determines, original OSC records may be presented for examination in response to a request, but they may not be presented as evidence or otherwise used in a manner by which they could lose their identity as official OSC records, nor may they be marked or altered.