27 C.F.R. § 72.41
In determining the nature and extent of the relief to be afforded a petitioner pursuant to allowance of his petition, the value of the property or carrier involved in the allowed petition shall be considered to mean the value placed on said property or carrier pursuant to official appraisal thereof immediately following seizure: Provided, however, That if the petitioner desires an up-to-date re-appraisal made of the property or carrier, after notification as to the terms of allowance of the petition, and makes written request therefor, undertaking in said request to pay, or to be liable for, the total costs of such re-appraisal, the property or carrier shall be re-appraised officially in the same manner in which the original appraisal was made, and the terms and conditions of allowance shall stand modified to the extent required by such re-appraisal.
27 C.F.R. § 72.41