An Act amending the act of June 23, 1931 (P.L.932, No.317), known as The Third Class City Code, further providing for the sale of real and personal property; providing for fire officers and for appointments to the board of health; permitting interests in firefighters' pension funds to vest after 12 years under certain conditions; providing for the amount of the retirement allowance benefit vested; adding a definition; and making an editorial change.