If an individual (the "customer ") serves on any person (the "trader ") a notice—
the trader shall, within the prescribed period after receiving the notice, either comply with it or serve on the customer a counter-notice stating that, as the case may be, he disputes the correctness of the notice or asserts that the customer is not indebted to him under the agreement.
Where the trader disputes the correctness of the notice he shall give particulars of the way in which he alleges it to be wrong.
Subsection (1) does not apply in relation to any agreement if the trader has previously complied with that subsection on the service of a notice under it with respect to that agreement.
Subsection (1) does not apply to a non-commercial agreement or to a regulated deferred payment credit agreement.
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A breach of the duty imposed by subsection (1) is actionable as a breach of statutory duty.