Section 15 of the Principal Act is hereby amended by the substitution of the following subsections for subsections (2) and (3):

"(2) Where a recommendation has been made by a rights commissioner in respect of a claim by an employee for redress under this Act or the hearing of a claim by the Tribunal has commenced, the employee shall not be entitled to recover damages at common law for wrongful dismissal in respect of the dismissal concerned.

(3) Where the hearing by a court of proceedings for damages at common law for wrongful dismissal of an employee has commenced, the employee shall not be entitled to redress under this Act in respect of the dismissal to which the proceedings relate.".