(a) The Board or any Board Member will, on the written application of any party, issue subpoenas requiring the attendance and testimony of witnesses and the production of any evidence, including books, records, correspondence, electronic data, or documents, in their possession or under their control. The Executive Secretary has the authority to sign and issue any such subpoenas on behalf of the Board or any Board Member. Applications for subpoenas, if filed before the hearing opens, must be filed