Change notification obligations: revised information can lead to a prior combination notice being declared not valid if competition impact significant Persons who have filed a notice must promptly inform the Commission of any changes to the information originally provided; the Secretary places change information before the Commission, which will assess and may record updates. If the Commission concludes the change is likely to materially affect factors used to determine an appreciable adverse effect on competition, it may, after reasons, treat the original notice as not valid and the Secretary must communicate that decision to the filer, with a limited mechanism to adjust previously paid fees against a new notice filed within the prescribed subsequent period.