An employee may use work-related accident leave: beginning on the first day of disability; and continuing until the earlier of: the day that the employee is able to return to work, as certified by a physician; or 6 months from the day of disability. After an employee returns to work, work-related accident leave may be granted for continuing treatment as certified by a physician selected by the appointing authority up to 6 months from the day of the original disability. Work-related accident leave may be granted for up to an additional 6 months if: the employee is certified by a physician selected or accepted by the appointing authority; and no decision has been reached by the Workers' Compensation Commission on the employee's claim.