For the purposes of this Part section 142 shall apply as if the following subsection were substituted for subsection (1):
"(1) A person shall not, at a particular time, be a director of more than -
(a) 25 designated activity companies, or
(b) 25 companies, one, or more than one, of which is a designated activity company and one, or more than one, of which is any other type of company capable of being wound up under this Act.".