Advance rulings for origin secure preferential tariff eligibility; importing party must decide within a prescribed timeframe and may revoke. Advance rulings determine whether a good qualifies as an originating good for preferential tariff treatment; Parties must issue written rulings to importers, exporters or producers prior to importation, may seek additional information while evaluating requests, and must decide within the prescribed timeframe. Rulings apply to subsequent importations for the period specified. An importing Party may modify or revoke a ruling for factual error, changed material facts, or to conform with Chapter modifications; modifications take effect after a delay and do not apply retroactively, except that a ruling may be revoked ab initio if false or incorrect information was provided, with domestic penalties applying.