(1) For the purposes of this Part a person is taken to be interested in shares if a body corporate is interested in them and -
(a) the body or its directors are accustomed to act in accordance with his directions or instructions, or
(b) he is entitled to exercise or control the exercise of one-third or more of the voting power at general meetings of the body.
(2) For the purposes of this section a person is treated as entitled to exercise or control the exercise of voting power if -
(a) another body corporate is entitled to exercise or control the exercise of that voting power, and
(b) he is entitled to exercise or control the exercise of one-third or more of the voting power at general meetings of that body corporate.
(3) For the purposes of this section a person is treated as entitled to exercise or control the exercise of voting power if -
(a) he has a right (whether or not subject to conditions) the exercise of which would make him so entitled, or
(b) he is under an obligation (whe
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