All of the assets of the retirement system shall be credited, according to the purposes for which they are held, to one of four funds; namely, the Annuity Savings Trust Fund, the Pension Accumulation Trust Fund, the Expense Trust Fund, and the Survivors' Benefit Trust Fund.
In the case of any member who has attained his or her minimum service retirement age prior to becoming a member, the proportion of salary applicable to such member, with respect to plan A, B, C, or D, shall be the proportion computed for the age 1 year younger than his or her minimum service retirement age.
Fla. Stat. § 238.09