Relating to retirement; modifying and clarifying certain provisions relating to the Minneapolis firefighters relief association; clarifying the definition of excess investment income and modifying the definition of surviving spouse member; requiring payment of corporate bond premiums from the special fund; modifying board membership requirements; clarifying the responsibility of the association for association funds and accounts; modifying certain provisions providing for service and nonservice related permanent disability pensions, for an alternative service pension for unmarried members and for surviving spouse and dependent pensions; clarifying certain provisions regulating health insurance accounts; specifying the intent of the law (Ch. 231, 2002)