(1) For the purposes of this Chapter, a person ("A") acquires control over a recognised investment exchange ("B") if any of the cases in subsection (2) begin to apply.
(2) The cases are where A holds -
(a) 20% or more of the shares in B or in a parent undertaking of B ("P");
(b) 20% or more of the voting power in B or P; or
(c) shares or voting power in B or P as a result of which A is able to exercise significant influence over the management of B.
(3) For the purposes of this Chapter, a person ("A") increases control over a recognised investment exchange ("B") whenever -
(a) the percentage of shares which A holds in B or in a parent undertaking of B ("P") increases from less than 50% to 50% or more;
(b) the percentage of voting power A holds in B or P increases from less than 50% to 50% or more; or
(c) becomes a parent undertaking of B.