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Where a tariff item has previously been the subject of a concession, the level of "other duties or charges" recorded in the appropriate Schedule shall not be higher than the level obtaining at the time of the first incorporation of the concession in that Schedule. It will be open to any Member to challenge the existence of an "other duty or charge", on the ground that no such "other duty or charge" existed at the time of the original binding of the item in question, as well as the consistency of the recorded level of any "other duty or charge" with the previously bound level, for a period of three years after the date of entry into force of the WTO Agreement or three years after the date of deposit with the Director-General of the WTO of the instrument incorporating the Schedule in question into GATT 1994, if that is a later date.