(a) Issue. Unless otherwise specified, the term “issue” in this subpart means a matter upon which the Board made a final decision (other than a decision under this subpart). As used in the preceding sentence, a “final decision” is one which was appealable under Chapter 72 of title 38, United States Code, or which would have been so appealable if such provision had been in effect at the time of the decision.

(b) Party. As used in this subpart, the term “party” means any party to the proceeding before the Board that resulted in the final Board decision which is the subject of a motion under this subpart.