petitioning party, shall determine whether the materials so submitted are sufficient to support a finding in favor of the petitioning party under applicable law and, if so, the appropriate relief and damages, if any, to be awarded. (B) If the Board makes an affirmative determination under subparagraph (A), the Board shall prepare a proposed default determination, and shall provide written notice to the responding party at all addresses, including email addresses, reflected in the records of the proceeding before the Board, of the pendency of a default determination by the Board and of the legal significance of such determination. Such notice shall be accompanied by the proposed default determination and shall provide that the responding party has a period of 30 days, beginning on the date of the notice, to submit any evidence or other information in opposition to the proposed default determination. (C) If the responding party responds to the notice provided under subparagraph (B) within the 30-day period provided in such subparagraph, the Board shall consider responding party’s submissions and, after allowing the petitioning party to address such submissions, maintain, or amend its proposed determination as appropriate, and the resulting determination shall not be a default determination. (D) If the respondent fails to respond to the notice provided under subparagraph (B), the Board shall proceed to issue the default determination. Thereafter, the respondent may only challenge such determination to the extent permitted under paragraph (28). (21) Petitioning party or interested owner’s failure to proceed If a petitioning party or interested owner who has joined the proceeding fails to proceed, as demonstrated by the failure, without justifiable cause, to meet one or more deadlines or requirements set forth in the schedule adopted by the Board, the Board may, upon providing written notice to the petitioning party or interested owner and a period of 30 days, beginning on the date of the notice, to respond to the