means a contract (not being a contract of employment, or a contract between NAMA and a NAMA group entity or a contract between a NAMA group entity and another NAMA group entity) whereby a person (in this Chapter referred to as "the contractor") is liable to another person (in this Chapter referred to as "the principal") -
(a) to carry out relevant operations,
(b) to be answerable for the carrying out of such operations by others, whether under a contract with the contractor or under other arrangements made or to be made by the contractor, or
(c) to furnish the contractor's own labour or the labour of others in the carrying out of relevant operations or to arrange for the labour of others to be furnished for the carrying out of such operations,
but, as respects relevant contracts entered into on or after the 15th day of May, 1996, a separate relevant contract shall be deemed to exist between the principal and each individual member of a gang or group of persons, including persons in p
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