39 CFR 960.5: Standards for awards.

(a) A prevailing applicant may receive an award for fees and expenses incurred in connection with a proceeding, including expenses and fees incurred in filing for an award under the Act, or in a significant and discrete substantive portion of the proceeding, unless the position of the agency over which the applicant has prevailed was substantially justified. The position of the agency includes in addition to the position taken by the agency in the adversary adjudication, the action or failure to act by the agency upon which the adversary adjudication is based. The burden of proof that an award should not be made to an eligible prevailing applicant is on Postal Service counsel.

(b) An award will be reduced or denied if the applicant has unduly or unreasonably protracted the proceeding or if special circumstances make the award sought unjust.