Parliamentary scrutiny of subordinate legislation requires rules and regulations to be laid before both Houses and permits modification. Every rule and regulation made under the Act must be laid before each House of Parliament for a collective period of thirty days across one or more sessions; if both Houses agree before the expiry of the immediately following session to modify or annul the rule or regulation, it will thereafter operate only in the modified form or cease to have effect, and such modification or annulment does not affect the validity of anything previously done under that rule or regulation. Rules made by State Governments must similarly be laid before the State Legislature.