Parliamentary scrutiny of delegated rules now permits both Houses to modify or annul rules after they are laid. Insertion of sub section (2A) requires every rule made by the Central Government under the Act to be laid before each House of Parliament for a total period of thirty days (in one or successive sessions); if, before the expiry of the immediately following session, both Houses agree to modify or to annul the rule, it will thereafter have effect only as modified or be of no effect, without prejudice to the validity of anything previously done under that rule.