(a) Discovery. A party must promptly supplement or amend any prior response to a discovery request if it learns that the response:
(1) Was incomplete or incorrect when made; or
(2) Though complete and correct when made, is now incomplete or incorrect in any material respect.
(b) Witnesses and exhibits.
(c) Failure to disclose.
(1) A party will not be permitted to introduce as evidence at the hearing testimony from a witness or other information that it failed to disclose under § 1.621(c), § 1.622(c), or § 1.625(c), or paragraph (a) or (b) of this section.
(2) Paragraph (c)(1) of this section does not apply if the failure to disclose was substantially justified or is harmless.
(3) A party may object to the admission of evidence under paragraph (c)(1) of this section before or during the hearing.
(i) The prejudice to the objecting party;
(ii) The ability of the objecting party to cure any prejudice;
(iii) The extent to which presentation of the evidence would disrupt the orderly and efficient hearing of the case;
(iv) The importance of the evidence; and
(v) The reason for the failure to disclose, including any bad faith or willfulness regarding the failure.