A special purpose license holder shall cooperate in the investigation of any possible grounds for revocation or limitation of the license by timely compliance with all subpoenas issued by the board for evidence or information, and shall provide within 21 days of receipt of a written request from a board investigator or attorney, clear and legible copies of requested documents, including medical records, which may be related to possible grounds for revocation or limitation of a special purpose license. Failure to timely comply with a board subpoena or provide clear and legible copies of requested records shall be grounds for revocation or limitation of a special purpose license pursuant to the provisions of §174.6 of this title (relating to Revocation and Limitation of Special Purpose License).