17. 8. 85 Official Journal of the European Communities No L 220/1 (Acts whose publication is not obligatory) COMMISSION COMMISSION DECISION of 7 June 1985 establishing a Community typology for agricultural holdings (85/377/EEC) THE COMMISSION OF THE EUROPEAN COMMUNITIES, Having regard to the Treaty establishing the European Economic Community, Having regard to Council Decision No 79/65/EEC of 15 June 1965 setting up a network for the collection of accountancy data on the incomes and business opera- tion of agricultural holdings in the European Economic Community (!), as last amended by Regulation (EEC) No 2143/81 (3). Having regard to Council Regulation (EEC) No 1463/84 of 24 May 1984 on the organization of the surveys on the structure of agricultural holdings for 1985 and 1987 (3), and in particular Article 6 (2) thereof, Whereas Commission Decision 78/463/EEC of 7 April 1978 establishing a Community typology for agricul- tural holdings (4), as last amended by Decision 84/ 542/EEC (), defines in Article 1 the two factors on which the Community typology is based, namely, the type of farming and the economic size of the holding; whereas these two factors are determined on the basis of the standard gross margin (SGM); Whereas the standard gross margin as defined in Article 1(d) of the aforementioned Decision is an economic criterion, expressed in monetary terms; wher- (') OJ No 109, 23. 6. 1965, p. 1859. () OJ No L210,30.7. 1981, p. 1. (*) OJ No L 142,29.5. 1984, p. 3. () OJNoL 148,5.6. 1978, p. 1. () OJ No L 293, 10. 11. 1984, p. 22. eas such a criterion is bound to undergo changes in the course of time; Whereas the standard gross margins set out in Annex I to the aforementioned Decision are based on average values over a reference period; whereas, therefore, they should regularly be updated to take account of econo- - mic trends so that the typology may continue meaning- fully to be applied for the purposes specified in Article 3 of that Decision; whereas for this purpose a frequency as far as possible linked to the years in which farm structure surveys are carried out should be prov-. ided for; | Whereas such updating should be carried out on the basis of the average gross margins observed over a reference period of several years; Whereas the list of characteristics for which gross stan- dard margins are established should be brought into line with the headings used in the farm structure, surveys: | Whereas there is a need for the classification scheme adopted by Decision 78/463/EEC to be amended in order better to take account of regional circumstances, especially in the Member States which have joined the EEC since that Decision entered into force, and of the changes made to the list of headings used in the struc- ture surveys; Whereas, however, the scheme must as far as possible be kept as it is, in order to ensure sufficient continuity " in time and hence permit trend analyses; Whereas the European Size Unit constitutes a basic unit expressed in terms of monetary value for a given