An issuer must, as soon as reasonably practicable, apply for a trading halt or a trading suspension where there is:
(a)    information under rule 37.47 or rule 37.47A; or
(b)    inside information which must be disclosed under the Inside Information Provisions; or
(c)    inside information which is the subject matter of an application to the Commission for a waiver but its confidentiality has been lost,
and the information cannot be announced promptly.