(1) Subject to paragraphs (2) to (5), a payment service user may not revoke a payment order after it has been received by the payer's payment service provider.
(2) In the case of a payment transaction initiated by a payment initiation service provider, or by or through the payee, the payer may not revoke the payment order after giving consent to the payment initiation service provider to initiate the payment transaction or giving consent to execute the payment transaction to the payee.
(3) In the case of a direct debit, the payer may not revoke the payment order after the end of the business day preceding the day agreed for debiting the funds.
(4) Where a day is agreed under regulation 81(5) (receipt of payment orders), the payment service user may not revoke a payment order after the end of the business day preceding the agreed day.
(5) At any time after the time limits for revocation set out in paragraphs (1) to (4), the payment order may only be revoked if the revocation is -
(a) ag
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