Where a purchaser concludes a single contract relating to objectively indissociable services which are subject, on the one hand, to the ordinary law of contracts provided for in Book I of Part Two or Book II thereof relating to partnership contracts and, on the other hand, to the ordinary law of concession contracts provided for in Book I of Part Three, this contract shall be subject to the provisions applicable to its main subject.
Where the main purpose of the contract cannot be objectively determined, the contract is subject to the ordinary law governing contracts set out in Book I of Part Two or Book II relating to partnership contracts.