Limitation on compensation
12The Commission shall pay to a firefighter or former firefighter only that portion of compensation which, when combined with the amount of any remuneration received by the firefighter or former firefighter from his or her employer or from any employment-related source or any income replacement or supplement benefit from any source does not exceed 85% of the firefighter’s or former firefighter’s prior net earnings calculated for the same period of time as that during which compensation is paid.