If at any time after the issue of the listing document or a supplementary listing document as provided for by this rule and before the commencement of dealings in any 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,

the issuer shall, as soon as practicable, submit to the Exchange for its review and, once the Exchange has confirmed that it has no further comments thereon, issue a supplementary listing document giving details of the change or new matter, unless the Exchange agrees otherwise.

For this purpose "significant" means significant for the purpose of making an informed assessment of the matters mentioned in rule 11.07 above.