OCAHO Practice Manual ch. 2.7

(a) Generally

The Special Counsel, or any other interested person or private organization, may petition to intervene as a party in unfair immigration-related employment cases under Immigration and Nationality Act § 274B.  The Administrative Law Judge (ALJ) may grant or deny such a petition.

(b) Limitation on Participation

The participation of any intervenor may be limited to the extent prescribed by the ALJ.

(c) Officers of the Department of Homeland Security (DHS)

An officer of DHS may not petition to intervene as a party in unfair immigration-related employment practice cases.