GONTHIER J.
I. Background Facts, Relevant Legislation and the Courts Below
133.__(1) Where a person, whether carrying on an industry included under this Act or not, in this section referred to as the principal, contracts with any other person, in this section referred to as the contractor, for the execution by or under the contractor of the whole or any part of any work for the principal, it is the duty of the principal to ensure that any sum that the contractor or any subcontractor is liable to contribute to the fund is paid and, where the principal fails to do so and the sum is not paid, he is personally liable to pay that sum to the board.
(2) The board shall have the same powers and be entitled to the same remedies for enforcing payment under subsection (1) that it possesses in respect of an assessment under this Act.
(3) Where the principal is liable to make payment to the board under subsection (1), he is entitled to be indemnified by any person who should have made the payment and is entitled to withhold, out of any indebtedness due to that person, a sufficient amount in respect of that indemnity.
(4) All questions as to the right to and the amount of such indemnity shall be determined by the board.