This Subdivision
extends to subcontracts made for the execution of work, and for that
purpose —
(a) a
reference to the principal is a reference to the original principal for whom
the work is being done and each contractor who constitutes themselves a
principal with respect to a subcontractor by contracting with the
subcontractor for the execution by the subcontractor of the whole or any part
of the work; and
(b) a
reference to the contractor is a reference to the original contractor and each
subcontractor; and
(c) a
principal’s right to indemnity is a right against each contractor
standing between the principal and the worker.