(a) the Exchange is satisfied that any Rule Violation has been, or may have been committed;

(b) the Exchange receives a complaint involving any Member, Approved Trader or Registered Representative or any Member's director, officer, employee or agent;

(c) there is a dispute between Members, Approved Traders or Registered Representatives in connection with trading on any market; or

(d) in the Exchange's opinion, having regard to its obligation to maintain a fair, orderly and transparent market, the circumstances warrant an investigation.