Laying of rules before legislature allows modification or annulment, while preserving validity of prior actions. Every rule, regulation and notification made or issued under the Act must be laid before the State Legislature for a total period of thirty days in session or successive sessions; if the Legislature, before the expiry of the session immediately following that period, agrees to modify or to annul the instrument, it will thereafter take effect only in the modified form or be of no effect, without prejudice to the validity of anything previously done under the original instrument.