11. Comparison methods

Subject to the provisions of section 10, the existence of dumping margin shall, generally be established on the basis of a comparison of a weighted average normal value with a weighted average of prices of all comparable export transactions, or by a comparison of normal value and export prices on a transaction to transaction basis.

A normal value established on a weighted average basis may be compared to prices of individual export transactions, if the Director-General finds a pattern of export prices which differ significantly among different purchasers, regions or time periods. It shall be the duty of the Director-General to explain in such cases, why such difference cannot be taken into account appropriately, by the use of a weighted average to weighted average or transaction to transaction comparison.