Any employe who shall have attained the age of 55 years, and shall have been an employe for a period of 10 years, and shall have contributed to said fund for the same period, shall have the right to retire and become a beneficiary under this Division, and to receive such benefit or annuity from said fund as shall be determined by said board of trustees, which said benefit or annuity shall be proportionate to the scale of pensions enumerated in Section 19-211 of this Division.
40 ILCS 5/19-209