Where a person or
authority has rendered to or provided for a worker any services for the cost
of which the employer is liable to pay to the worker under this Act —
(a) the
employer may pay to that person or authority the whole or any part of the
amount owing to him or it and such a payment shall, to the extent of the
amount paid, be a discharge of the liability of the employer to the worker
under this Act and of the liability of the worker to that person or authority
for the services; and
(b) if
the whole or any part of the amount owing to that person or authority is not
paid he or it has, in respect thereof, the same rights and remedies against
the employer as the worker has.