A public company may give notice under this section to any person whom the company knows or has reasonable cause to believe—
The notice may require the person—
The notice may require the person to whom it is addressed to give particulars of his own present or past interest in the company's shares (held by him at any time during the three year period mentioned in subsection (1)(b)).
The notice may require the person to whom it is addressed, where—
to give, so far as lies within his knowledge, such particulars with respect to that other interest as may be required by the notice.
The particulars referred to in subsections (3) and (4) include—
The notice may require the person to whom it is addressed, where his interest is a past interest, to give (so far as lies within his knowledge) particulars of the identity of the person who held that interest immediately upon his ceasing to hold it.
The information required by the notice must be given within such reasonable time as may be specified in the notice.