5 CFR § 930.207 - Details and assignments to other duties within the same agency.
(c) An agency may assign an administrative law judge to perform non-administrative law judge duties only when:
(1) The other duties are consistent with administrative law judge duties and responsibilities;
(2) The assignment is to last no longer than 120 days; and
(d) OPM may authorize a waiver of paragraphs (c)(2) and (c)(3) of this section if an agency shows that it is in the public interest to do so. In determining whether a waiver is justified, OPM may consider, but is not restricted to considering, such factors as unusual case load or special expertise of the detailee.