Section 749 - Record of proceedings of the board; certificates and subpoenas1. The board shall cause a record to be kept of its proceedings by its secretary or other officer designated by it.2. The records of its proceeding and copies of all papers and documents in its possession and custody may be authenticated in the usual form, under the official seal of the board and the signature of the chairman or secretary of the board, and shall be received in evidence in the same manner and with like effect as deeds regularly acknowledged or proven.3. The board may issue subpoenas, which, when authenticated by any member or the secretary shall be regulated by the civil practice law and rules.