§ 803. Witnesses; production of documents; subpoenas and commissions. A board of inquiry shall have power, if and to such extent as may be authorized by rules made under this article, to require any person who appears to the board to have any knowledge of the subject matter of the inquiry to furnish in writing or otherwise such particulars in relation thereto as the board may require, to issue subpoenas for and compel the attendance of witnesses and the production of books, contracts, papers, documents and other evidence, and to administer oaths and take testimony and take or cause to be taken depositions of witnesses residing within or without this state. A subpoena issued under this section shall be regulated by the civil practice law and rules. Subpoenas and commissions to take testimony shall be issued under the seal of the department.