708Power to obtain information
Where it appears to the Board that by reason of any transaction or transactions a person may be a person to whom section 703 applies, the Board may by notice served on him require him, within such time not less than 28 days as may be specified in the notice, to furnish information in his possession with respect to the transaction or any of the transactions, being information as to matters, specified in the notice, which are relevant to the question whether a notice under section 703(3) should be given in respect of him.