For the purposes of, and subject to, the provisions of the Corporation Tax Acts which apply this section, "control", in relation to a company, means the power of a person to secure -

(a) by means of the holding of shares or the possession of voting power in or in relation to that or any other company, or

(b) by virtue of any powers conferred by the constitution, articles of association or other document regulating that or any other company,

that the affairs of the first-mentioned company are conducted in accordance with the wishes of that person and, in relation to a partnership, means the right to a share of more than 50 per cent of the assets, or of more than 50 per cent of the income, of the partnership.