Notwithstanding any other provision of this part, retirement and death allowances shall continue to be set and adjusted pursuant to Chapter Five of this Article.
However, death benefits and survivor allowances, retirement allowances, adjustments to retirement allowances and adjustments to continuant allowances payable by the Retirement System and based on fiscal year 1991-1992 wages and salaries covered by Charter section 8.407, shall be calculated for all employees covered by Charter sections 8.401 and 8.407 based on the rates certified by the civil service commission to the Board of Supervisors as though the 1991-1992 salary standardization ordinance vetoed by the Mayor had become law. No such payment shall exceed the maximum amount permitted by Section 415 of the Internal Revenue Code of 1986, as amended from time to time, or the maximum amount which would still permit the Retirement System to preserve its tax-qualified status under Section 401 of the Internal Revenue Code of 1986, as amended from time to time.