2. Nothing in Articles 502(1)(d) and (f), 504(e) and 506(6) shall be construed to prevent a Party from applying such measures as the circumstances may warrant.
Subchapter C - Advance Rulings
Articles 509: Advance Rulings
1. Each Party shall, through its customs administration, provide for the expeditious issuance of written advance rulings, prior to the importation of a good into its territory, to an importer in its territory or an exporter or a producer in the territory of another Party, on the basis of the facts and circumstances presented by such importer, exporter or producer of the good, concerning:
(a) whether materials imported from the territory of a non- Party undergo, as a result of production in the territory of one or more of the Parties, the applicable change in tariff classification under Chapter Four (Rules of Origin) to qualify as an originating good;
(b) whether a good satisfies a regional value-content requirement under either the transaction value method or the net cost method set out in Chapter Four;
(c) the appropriate basis or method for customs value to be applied by an exporter or a producer in the territory of another Party, in accordance with the principles of the Customs Valuation Code, in calculating the transaction value of a good, or the value of materials used in the production of a good, for which an advance ruling is requested, for the purpose of determining whether the good satisfies a regional value-content requirement under Chapter Four;
(d) the appropriate basis or method for reasonably allocating costs, in accordance with the allocation methods set out in the Uniform Regulations, for calculating the net cost of a good, or the value of an intermediate material, for which an advance ruling is requested, for the purposes of determining whether the good satisfies a regional value-content requirement under Chapter Four;
(e) whether a good that re-enters its territory after the good has been exported from its territory to the territory of another Party for repair or alteration qualifies for duty-free treatment in accordance with Article 307 (Goods Re-entered After Repair or Alteration);
(f) whether the proposed or actual marking of a good satisfies country of origin marking requirements under Article 312 (Country of Origin Marking); or