(a) In a case in which a hearing is not required under § 906.1 of this chapter, the Board may request in writing that specified documents or other evidence be furnished to it and/or may authorize the executive secretary to obtain such additional documents or other evidence as may be necessary to understand and decide the case.

(b) Each party will be offered the opportunity to review and to supplement, by written submissions, the record of proceedings, prior to the date fixed by the Board for closing of the Record. The Board shall then consider the case and make a decision based on that Record. This may include the ordering of a hearing in accordance with part 906.