The Exchange must be notified immediately if, before the commencement of dealings in any debt securities, the issuer becomes aware that:—

(1) there has been a significant change affecting any matter contained in the listing document; or
(2) a significant new matter has arisen, the inclusion of information in respect of which would have been required to be in the listing document if it had arisen before the listing document was issued.

For this purpose "significant" means significant for the purpose of making an informed assessment of the matters mentioned in rule 29.08(4). The Exchange will consider in each case what action should be taken and whether any publication of the change or new matter is required. In such circumstances, the Exchange may, at its absolute discretion, withdraw any listing approval granted or impose any conditions which it considers appropriate.