9Where an accident occurs to a worker in the course of his employment in such circumstances as to entitle him or his dependents to any claim or right of action against his employer under or by virtue of any statute of Canada, or of the United Kingdom of Great Britain and Northern Ireland, the worker or dependents are entitled to compensation under this Part to the extent to which the compensation under this Part would exceed in amount or value the amount or value of such claim or right of action; but if such worker or his dependents execute and give a full and effectual release of the employer from any claim or right of action, the Commission may pay to that worker or dependents the full amount of compensation provided by this Part.