20 CFR § 404.1750 - Notice of charges against a representative.
(c) We will advise the representative to file an answer, within 14 business days from the date of the notice, or from the date the notice was delivered personally, stating why he or she should not be suspended or disqualified from acting as a representative in dealings with us.
(d) The General Counsel or other delegated official may extend the 14-day period specified in paragraph (c) of this section for good cause, in accordance with § 404.911.
(e) The representative must -
(1) Answer the notice in writing under oath (or affirmation); and
(f) If the representative does not file an answer within the 14-day time period specified in paragraph (c) of this section (or the period extended in accordance with paragraph (d) of this section), he or she does not have the right to present evidence, except as may be provided in § 404.1765(g).
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