Laying of subordinate legislation: rules and notifications must be presented to Parliament and may be modified or annulled. Rules, regulations and notifications made under the Act by the Central Government or the Board must be laid before each House of Parliament while in session for a cumulative period of thirty days. Both Houses may, before the expiry of the following session, agree to modify or annul the instrument; such modification or annulment takes effect thereafter but does not prejudice the validity of anything previously done under the instrument.