; and if a claimant fails to complete service on all respondents within the 90-day period, the proceeding shall be dismissed by the Copyright Claims Board without prejudice. (2) Failure to prosecute If a claimant fails to proceed in an active proceeding, as demonstrated by his or her failure to meet one or more deadlines or requirements set forth in the schedule adopted by the Copyright Claims Board pursuant to subsection (j) without justifiable cause, the Copyright Claims Board may, upon providing written notice to the claimant and 30 days to respond, issue a determination dismissing the claimants’ claims, which shall include an award of attorneys’ fees and costs if appropriate under subsection (x)(2). Thereafter, the claimant may only challenge such determination to the extent permitted under section 1407(c): Provided, however , That prior to the initiation of any additional proceedings under section 1407, the Copyright Claims Board shall have the discretion to vacate the determination of dismissal in the interests of justice. (v) Reconsideration A party may, within 30 days of the date of issuance of a final determination by the Copyright Claims Board, 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 respond by denying the request or issuing an amended final determination. (w) Review by register A party who has been denied reconsideration by the Copyright Claims Board may, within 30 days of the date of such denial, request review by the Register of Copyrights in accordance with regulations established by the Register of Copyrights, which regulations shall provide for a reasonable filing fee. The Register’s review shall be limited to consideration of whether the Copyright Claims Board abused its discretion in denying reconsideration. After providing the other parties