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(1)This section applies where a person has a third-party right to enforce or otherwise invoke an undertaking contained in a contract.
(2)A contracting party has available, as a defence against a claim by the person that the undertaking has been breached, any defence which is both—
(a)a defence that a contracting party would have against any other contracting party, and
(b)relevant to the undertaking.
(3)Subsection (2) is subject to any contrary provision made in the contract.