(a) In representing the officer issuing the wage determination the Solicitor shall, among other things, file promptly with the Board a record supporting his findings and conclusions, after receipt of service of the petition.

(b) In representing the officer issuing the wage determination the Solicitor shall file with the Board a statement of the position of the officer issuing the wage determination concerning any findings challenged in the petition; and shall make service on the petitioner and any other interested persons.