Claims Board may, in the interests of justice, vacate the default determination. (v) Claimant’s failure To proceed (1) Failure to complete service If a claimant fails to complete service on a respondent within the 90-day period required under subsection (g), the Copyright Claims Board shall dismiss that respondent from the proceeding without prejudice. If a claimant fails to complete service on all respondents within that 90-day period, the Copyright Claims Board shall dismiss the proceeding without prejudice. (2) Failure to prosecute If a claimant fails to proceed in an active proceeding, as demonstrated by the claimant’s failure, without justifiable cause, to meet one or more deadlines or requirements set forth in the schedule adopted by the Copyright Claims Board under subsection (k), the Copyright Claims Board may, upon providing written notice to the claimant and a period of 30 days, beginning on the date of the notice, to respond to the notice, and after considering any such response, issue a determination dismissing the claimants’ claims, which shall include an award of attorneys’ fees and costs, if appropriate, under subsection (y)(2). Thereafter, the claimant may only challenge such determination to the extent permitted under section 1508(c), except that, before any additional proceedings are initiated under section 1508, the Copyright Claims Board may, in the interests of justice, vacate the determination of dismissal. (w) Request for reconsideration A party may, within 30 days after the date on which the Copyright Claims Board issues a final determination in a proceeding under this chapter, submit a written request for reconsideration of, or an amendment to, such determination if the party identifies a clear error of law or fact material to the outcome, or a technical mistake. After providing the other parties an opportunity to address such request, the Copyright Claims Board shall either deny the request or issue an amended final determination. (x) Review by register If the Copyright Claims Board