Parliamentary scrutiny of delegated rules: rules and notifications must be laid before Parliament and may be modified or annulled. Rules and notifications must be laid before each House of Parliament for a cumulative thirty days across one or two successive sessions; if both Houses agree before the end of the session in which it is laid or the immediately following session, they may modify or annul the rule or notification, and the instrument will thereafter take effect only as modified or be of no effect, without prejudice to the validity of anything previously done under it.