4. In the event that a Party imposes a restriction on imports of an energy or basic petrochemical good from non-Party countries, the Parties, upon request of any Party, shall consult with a view to avoiding undue interference with or distortion of pricing, marketing and distribution arrangements in another Party.
5. Parties may administer a system of import and export licensing for energy and basic petrochemical goods provided that such system is operated in a manner consistent with the provisions of this Agreement, including paragraph 1 and Article 1502 (Monopolies and State Enterprises).
6. In addition, the Parties recognize the provisions of Annex 603.6.
Article 604: Export Taxes
No Party shall maintain or introduce any tax, duty, or charge on the export of any energy or basic petrochemical good to the territory of any other Party, unless such tax, duty, or charge is also maintained or introduced on such energy or basic petrochemical good when destined for domestic consumption.
Article 605: Other Export Measures
A Party may maintain or introduce a restriction otherwise justified under the provisions of Articles XI:2(a) and XX(g), (i) and (j) of the GATT with respect to the export of an energy or basic petrochemical good to the territory of another Party, only if:
(a) the restriction does not reduce the proportion of the total export shipments of a specific energy or basic petrochemical good made available to such other Party relative to the total supply of that good of the Party maintaining the restriction as compared to the proportion prevailing in the most recent 36-month period for which data are available prior to the imposition of the measure, or in such other representative period on which the Parties involved may agree;
(b) the Party does not impose a higher price for exports of an energy or basic petrochemical good to such other Party than the price charged for such energy good when consumed domestically, by means of any measure such as licenses, fees, taxation and minimum price requirements. The foregoing provision does not apply to a higher price which may result from a measure taken pursuant to subparagraph (a) that only restricts the volume of exports; and
(c) the restriction does not require the disruption of normal channels of supply to such other Party or normal proportions among specific energy or basic petrochemical goods supplied to the other Party such as, for example, between crude oil and refined products and among different categories of crude oil and of refined products.