or unrepresented party advocates are warranted by existing law or by a nonfrivolous argument for extending, modifying, or reversing existing law or for establishing new law. (C) The factual contentions have evidentiary support or, if specifically so identified, will likely have evidentiary support after a reasonable opportunity for discovery. (D) The denials of factual contentions are warranted on the evidence or, if specifically so identified, are reasonably based on belief or a lack of information. (2) Sanctions (A) In general If a decisionmaker described in subparagraph (B) determines that a designated representative of a party, or unrepresented party, has failed to comply with the standards specified in paragraph (1), then that decisionmaker may impose appropriate sanctions. (B) Decisionmaker A decisionmaker described in subparagraph (A) is— (i) a hearing officer or mediator chosen from the list specified in section 405(c)(2), who is not serving as a hearing officer or mediator to resolve any claim filed under section 402 that is associated with— (I) the designated representative or unrepresented party