by way of exchange of letters between the Community and the supplier countries. 3. The European Community shall take action to ensure that the overall Community tariff quota of a total of 50 000 metric tonnes, expressed as boneless meat, of frozen beef falling within subheading 02.01 A II b) of the Common Customs Tariff, which was opened under GATT and which is eligible for customs duty at a rate of 20 %, is raised to 53 000 metric tonnes. 4. Frozen fillets of hake (Merluccius spp.) falling within subheading 03.01 B II b) 9 of the Common Customs Tariff: - duty bound at 15 %, subject to compliance with the reference price, - duty reduced to 10 %, subject to compliance with the reference price, within an annual quota of 5 000 metric tonnes, for industrial blocks with bones ('standard'), within the period from 1 July to 31 December, to be granted by the competent authorities of the Community. Consultations may take place at the request of either party to the Agreement. ANNEX II With reference to paragraph II.B.1 of the Agreement on the conclusion of negotiations between Argentina and the European Community under GATT Article XXIV.6, the following modalities shall apply: 1. In order to ensure the minimum level of imports of two million metric tonnes of corn and 300 000 metric tonnes of sorghum into Spain, the Community will establish as a general mechanism a system consisting of an import tender for a reduced levy for corn and for sorghum imports into Spain. 2. In order to guarantee the import of the total quantities negotiated, a back-up mechanism will be established, enabling direct purchases of corn and sorghum on world markets for Spain, under the control of the Commission. The Commission will proceed to such purchases on a regular basis if it proves necessary and following bilateral consultations where appropriate. 3. The Commission will ensure that the minimum annual import levels are fully met not later than two months after each calendar year concerned. 4. The quantities of the non-grain feed ingredients imported into Spain and listed below will be deducted proportionally from the global yearly quantities which have been negotiated for corn and for sorghum: 1.2 // // // CCT heading No // Product description // // // 23.03 A II // Corn gluten feed // 23.03 B II // Brewing and distilling dregs and waste // 23.06 A II // Citrus peels and pellets // //