Sec. 5. ACCUMULATED FUNDS. In all such cities where a general pension fund for city employees has been accumulated but has not been put into operation at the effective date of this Act, the governing body of each such city shall segregate from said fund, the proportion which the total number of members of the police department (eligible to said pension fund) bears to the entire number of all city employees, for whose benefit said fund was accumulated, and shall set aside such sum into the policemen's relief and retirement fund.