Article 3
1. The export levy may be fixed in advance. The export levy on the products referred to in Article 1 shall be fixed in advance, at the request of the party concerned, when application for a licence is made, in respect of exports to be effected during the period of validity of that licence. In that case, the amount of the levy fixed in advance shall be that which applies on the day on which application for the export licence is made. 2. In the case of modification to the production refunds specified in Article 1 of Regulation (EEC) No 1955/75 between the day of application and the day of export, the export levy fixed in advance shall be adjusted. This adjustment shall be made by increasing or decreasing the prefixed amount of the levy by the difference resulting from such modification, this difference being multiplied by the coefficient shown in column 4 of the Annex to Regulation (EEC) No 1052/68 for the products in question.