(7) He or she shall allow free access to all books, plans, papers or property belonging to the Corporation, to all persons authorised by the Cemetery Committee to examine the same, and he or she shall furnish to all or any person or persons who may require them and who may apply to him or her for that purpose certified extracts from the books, and shall be allowed to charge twenty-four cents for each such extract to the person or persons requiring the same, to be paid to him or her for his or her own use.