Changes made by Regulation (EEC) No 630/75 of the Commission of 12 March 1975 on a standing invitation to tender to determine subsidies on white sugar produced in excess of the maximum quota and in respect of which no export levy is to apply, with the option of delivery to Italy: Regulation (EEC) No 2637/70 of the Commission of 23 December 1970 on special detailed rules for the application of the system of import and export licences and advance fixing certificates for agricultural products