For purposes of Sec. Sec. 390.30 through 390.70 of this part:
(a) Any term in the singular includes the plural, and the plural includes the singular, if such use would be appropriate;
(b) Any use of a masculine, feminine, or neuter gender encompasses all three, if such use would be appropriate;
(c) The term counsel includes a non-attorney representative; and
(d) Unless the context requires otherwise, a party's counsel of record, if any, may, on behalf of that party, take any action required to be taken by the party.