Paragraph 2

may by notice in the prescribed form served on the landlord or the tenant require him to give to the committee, within such period of not less than twenty-one days from the service of the notice as may be specified in the notice, such information as it may reasonably require; and

shall serve on the landlord and on the tenant a notice specifying a period of not less than twenty-one days from the service of the notice during which either representations in writing or a request to make oral representations may be made by him to the committee.