A person may carry on the business of buying or selling listed securities if that person—
(b) | effects such buying or selling through an authorised user; |
(c) | is a financial institution transacting as principal with another financial institution also transacting as principal; or |
(d) | is a person who, subject to any condition that the registrar may prescribe, buys or sells listed securities in order to— |
(i) | give effect to a reconstruction of a company or group of companies by the issue or reallocation of shares, or a takeover by one company of another or an amalgamation of two or more companies; or |
(ii) | effect a change in the control over management or the business of a company. |