(a) Not more than once in each period of 12 calendar months, an employee and an insurance carrier each may request the commissioner to review the status of the employee and determine whether the employee's unemployment or underemployment is a direct result of impairment from the compensable injury.
(b) Either party may request a benefit review conference to contest a determination of the commissioner at any time, subject only to the limits placed on the insurance carrier by Section 408.147.