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.
The cases are where A holds—
20% or more of the shares in B or in a parent undertaking of B ("P");
20% or more of the voting power in B or P; or
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.
For the purposes of this Chapter, a person ("A") increases control over a recognised investment exchange ("B") whenever—
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;
the percentage of voting power A holds in B or P increases from less than 50% to 50% or more; or
A becomes a parent undertaking of B.