Retirement; Authorizing an elected officer, except while serving as a legislator, to remain in elective office and receive accumulated Deferred Retirement Option Program (DROP) proceeds after the officer attains a certain age; revising the cost-of-living adjustment for eligible Special Risk Class retirees; defining the term “eligible Special Risk Class retiree”; revising required employer retirement contribution rates for each membership class and subclass of the Florida Retirement System; revising required allocations from the Contributions Clearing Trust Fund to provide disability coverage to members of the investment plan of the Florida Retirement System, etc.