Within 30 days after issuance of a modified child support order, the party obtaining the modification shall file a certified copy of the order with the issuing tribunal that had continuing, exclusive jurisdiction over the earlier order and with each tribunal in which the party knows that an earlier order has been registered. Failure of the party obtaining the order to file a certified copy as required subjects that party to appropriate sanctions by a tribunal in which the issue of failure to file arises, but that failure has no effect on the validity or enforceability of the modified order of the new tribunal of continuing, exclusive jurisdiction.