A. The normal contribution which shall be required as a deduction from the compensation of each member throughout his membership shall be such as, on the average for such member, if his service on full salary is uninterrupted and when accumulated with interest added to the equal accumulated contributions of the city and applied according to the actuarially recommended rates and table and approved by the retirement board, will provide a retirement allowance on retirement for service at the age of fifty-five years equal to one-half of his final compensation, less that part of the retirement allowance set forth in subsection C of Section 2.92.230, which is to be provided by contributions of the city on account of service rendered prior to the effective date of the ordinance codified in this chapter.

B. The percentage of a member’s final compensation to be provided, on the average, for him for a retirement allowance, for each year of service as a member, shall be derived by dividing fifty percent by the total number of years of service which would be credited to him under the system if his services are uninterrupted until he reaches the minimum age at which he is permitted to retire for service. (Prior code § 5.38.110(c))