Chapter Four, this Chapter, the Marking Rules, the

Uniform Regulations or other provision of this Agreement as required to conform with any change to the Harmonized System; and

(e) consider any other matter referred to it by a Party, or by the Customs Subgroup established under paragraph 6.

4. Each Party shall, to the greatest extent practicable, take all necessary measures to implement any modification of or addition to this Agreement within 180 days after the Commission agrees on any such modification or addition.

5. If the Working Group fails to resolve a matter referred to it pursuant to paragraph 2(f) within 30 days of such referral, any Party may request a meeting of the Commission pursuant to Article 2007.

6. The Working Group shall establish, and monitor the work of, a Customs Subgroup comprising representatives of each Party. The Subgroup shall meet at least four times a year and on the request of any Party and shall:

(a) endeavor to agree on

(i) the uniform interpretation, application and administration of the provisions of Articles 303, 308 and 312, Chapter Four, this Chapter, the Marking Rules and the Uniform Regulations,

(ii) tariff classification and valuation matters relating to determinations of origin,

(iii) equivalent procedures and criteria for the request, approval, modification, revocation and implementation of advance rulings,

(iv) revisions to the Certificate of Origin,

(v) any other matter referred to it by a Party, the Working Group or the Committee on Trade in Goods established under Chapter Three, and

(vi) any other customs-related matter arising under this Agreement;

(b) consider

(i) the harmonization of customs-related automation requirements and documentation, and

(ii) proposed customs-related administrative and operational changes that could affect the flow of trade between the Parties' territories;

(c) report periodically to the Working Group and notify it of any agreement reached under this paragraph; and

(d) refer to the Working Group any matter on which it has been unable to reach agreement within 60 days after the matter was referred to it pursuant to subparagraph (a)(v).

7. Nothing in this Chapter shall be construed to prevent a Party from issuing a determination of origin or an advance ruling related to a matter under consideration by the Customs Subgroup or the Working Group or from taking such other action as it considers necessary pending a resolution of the matter pursuant to this Agreement.

Article 514: Definitions

For purposes of this Chapter:

advance ruling means a written interpretation issued by the customs administration of a Party on the application of a measure to a given set of facts and circumstances regarding a prospective importation of a good into its territory;

commercial importation means the importation of a good into the territory of any Party for the purpose of sale, or any commercial, industrial, or other like use;

customs administration means the competent authority that is responsible under the domestic law of a Party for the administration of customs laws and regulations;

customs value means "customs value" as defined in Article 415;

determination of origin means a determination as to whether a good qualifies as an originating good in accordance with Chapter Four (Rules of Origin);

exporter in the territory of a Party includes an exporter located in the territory of a Party or an exporter required under this Chapter to maintain records in the territory of that Party regarding exportations of a good;

identical goods means goods that are the same in all respects, including physical characteristics, quality and reputation, irrespective of minor differences in appearance that are not relevant to the determination of origin of such goods under