to replace any or all references in this Schedule to a percentage figure with references to some other (larger or smaller) percentage figure;

to change or supplement Part 1 of this Schedule so as to include circumstances (for example, circumstances involving more complex structures) that give a foreign power a level of control over a person broadly similar to the level of control given by the conditions in paragraph 1;

in consequence of any provision made by virtue of paragraph (b), to change or supplement Part 2 of this Schedule so that circumstances specified in that Part in which a person is to be regarded as holding an interest in another person correspond to any of the conditions in paragraph 1, or would do so but for the extent of the interest.