8.5.1
A contract made on SGX-ST can be cancelled only in accordance with this Rule. For avoidance of doubt, a contract is not cancelled if:—
1) delivery fails;
(2) payment is not made on delivery; or
(3) the share registrar refuses to register a transfer.
8.5.2
SGX-ST may cancel a contract in any of the following circumstances:—
(1) the Trading Members to an error trade (Rule 8.6) have agreed to the cancellation;
(2) if a material mistake led to the error trade (Rule 8.6) and SGX-ST is satisfied that the trade should be cancelled;
(3) there is prima facie evidence of fraud or wilful misrepresentation in relation to the contract; or
(4) in SGX-ST's opinion, it is desirable to cancel the contract to protect the financial integrity, reputation or interests of the markets established or operated by SGX-ST.