(a) (8). The Committee established in pursuance of Article VII: 2 (a) of the Arrangement (hereinafter referred to as the Committee) may amend the contents of that Annex.Prompt payment against documents.Article 3Minimum PricesLevel and observance of minimum prices1. Participants undertake to take the steps necessary to ensure that the export prices of the products defined in Article 2 of this Protocol shall not be less than the minimum prices applicable under the present Protocol. If the products are exported in the form of goods in which they have been incorporated, participants shall take the steps necessary to avoid the circumvention of the price provisions of this Protocol.2. (a) The minimum price levels set in the present Article take account, in particular, of the current market situation, dairy prices in producing participants, the need to ensure an appropriate relationship between the minimum prices established in the Protocols to the present Arrangement, the need to ensure equitable prices to consumers, and the desirability of maintaining a minimum return to the most efficient producers in order to ensure stability of supply over the longer term.(b) The minimum prices provided for in paragraph 1 of the present Article applicable at the date of entry into force of this Protocol are fixed at:(i) US $ 425 (9) per metric ton for the skimmed-milk powder defined in Article 2 of this Protocol.(ii) US $ 725 (10) per metric ton for the whole milk powder defined in Article 2 of this Protocol.(iii) US $ 425 (11) per metric ton for the buttermilk powder defined in Article 2 of this Protocol.3. (a) The levels of the minimum prices specified in the present Article can be modified by the Committee, taking into account, on the one hand, the results of the operation of the Protocol and, on the other hand, the evolution of the situation of the international market.(b) The levels of the minimum prices specified in the present Article shall be subject to review at least once a year by the Committee. The Committee shall meet in September of each year for this purpose. In undertaking this review the Committee shall take account in particular, to the extent relevant and necessary, of costs faced by products, other relevant economic factors of the world market, the need to maintain a long-term minimum return to the most economic producers, the need to maintain stability of supply and to ensure acceptable prices to consumers, and the current market situation and shall have regard to the desirability of improving the relationship between the levels of the minimum prices set out in paragraph 2(b) of the present Article and the dairy support levels in the major producing participants.Adjustment of minimum prices 4. If the products actually exported differ from the pilot products in respect of the fat content, packaging or terms of sale, the minimum prices shall be adjusted so as to protect the minimum prices established in this Protocol for the products specified in Article 2 of this Protocol according to the following provisions:Milk fat content:If the milk fat content of the milk powders described in Article 1 of the present Protocol excluding buttermilk powder (12) differs from the milk fat content of the pilot products as defined in Article 2.1(a) and (b) of the present Protocol, then for each full percentage point of milk fat as from 2 per cent, there shall be an upward adjustment of the minimum price in proportion to the difference between the minimum prices established for the pilot products defined in Article 2.1(a) and (b) of the present Protocol (13).Packaging:If the products are offered otherwise than in packages normally used in the trade, of a net content by weight less than 25 kg or 50 lbs, as appropriate, the minimum prices shall be adjusted so as to reflect the difference in the cost of packaging from the type of package specified above.Terms of sale:If sold on terms other than f.o.b. from the exporting country or free-at-frontier exporting country (14), the minimum prices shall be calculated on the basis of the minimum f.o.b. prices specified in paragraph 2 (b) of this Article, plus the real and justified costs of the services provided: if the terms of the sale include credit, this shall be charged for at the prevailing commercial rates in the country concerned.Exports and imports of skimmed-milk powder and buttermilk powder for purposes of animal feed 5. Dy derogation from the provisions of paragraphs 1 to 4 of this Article participants may, under the conditions defined below, export or import, as the case may be, skimmed-milk powder and buttermilk powder for purposes of animal feed at prices below the minimum prices provided for in this Protocol for these products. Participants may make use of this possibility only to the extent that they subject the products exported or imported to the processes and control measures which will be applied in the country of export or destination so as to ensure that the skimmed-milk powder and buttermilk powder thus exported