The Commissioner of the Immigration and Naturalization Services may redelegate to any employee of the Service or the Department of Justice any of the powers, privileges, or duties conferred or imposed on the Commissioner by § 0.105. The Commissioner is authorized to confer or impose upon any employee of the United States, with the consent of the head of the Department or other independent establishment under whose jurisdiction the employee is serving, any of the powers, privileges, or duties conferred or imposed on the Commissioner by § 0.105. Existing redelegations by the Commissioner shall continue in force and effect until modified or revoked.