Subsection (a) of Section 5 and Section 11 do not apply to any injury or death sustained by an employee as to which the recovery of compensation benefits under this Act would be precluded due to the operation of any period of repose or repose provision. As to any such injury or death, the employee, the employee’s heirs, and any person having standing under the law to bring a civil action at law, including an action for wrongful death and an action pursuant to § 27-6 of the Probate Act of 1975, has the nonwaivable right to bring such an action against any employer or employers.