An applicant or custodian requesting dispute resolution through the Office shall provide the Office with: A copy of the applicant’s written request for public records; The custodian’s 10-day letter, if applicable; The custodian’s final response, if any; and A brief description of the dispute. An applicant or custodian may provide the Office with: Any records produced to the applicant by the custodian; and Any relevant correspondence between the applicant and custodian. Upon the Office’s request, an applicant or custodian may provide the Office with any other documents that the Ombudsman believes may facilitate the mediation process. Upon receipt of all necessary information and documents, and subject to Regulation .05 of this chapter, the Office shall open a file as soon as practicable. The failure of an applicant or custodian who is requesting dispute resolution to provide the Office with the documents identified in §A of this regulation may result in the Office declining to open a file.