The mayor of the city shall be ex-officio chairman of the board of police retirement fund commissioners and the members of the board shall elect the other necessary officers. The secretary of the board shall make a semiannual report to the city council as to the condition of the said "policeman’s retirement fund:" their receipts and disbursements in the accounts of same, a complete list of the beneficiaries of the said fund and a list of the amount paid to each of said persons. The city treasurer shall, from the records of his office, furnish the secretary with any pertinent or necessary information which may be needful or necessary to compile such report or to furnish the board with the proper information: all reports to be written, signed and dated by the secretary.