Sec. 3.07. BOARD RECORDS. The board shall keep or cause to be kept in convenient form data necessary for actuarial valuation of various funds of the police retirement system and for checking the experience of the system. The board shall keep a record of all its proceedings, which shall be open to public inspection, and shall publish annually a report showing the fiscal transactions of the police retirement system for the preceding year and the amount of its accumulated cash and securities as disclosed by the most recent actuarial valuation of assets and liabilities.