If an employee who is the victim of a work-related accident becomes partially incapacitated from pursuing his or her usual and customary line of employment he or she is entitled to a decreased earning capacity award except in cases compensated under the specific schedule set forth in paragraph 305/8(e) of the Act. The employee is entitled to this compensation for the duration of his or her disability subject to the limitations for certain maximum amounts set forth in Section 305/8(b) of the Act. This compensation is equal to 66 – 2/3% of the difference between the average amount which he or she would be able to earn in the full performance of his or her duties in the job the employee was engaged in at the time of the accident and the average amount which he or she is earning or is able to earn in some suitable employment or business after the accident. For accidental injuries that occur on or after September 1, 2011, an award for wage differential shall be effective only until age 67 or 5 years from the date the award becomes final, whichever is later. 820 ILCS 305/8(d)1.