Article 4
1. Samples of at least 200 seed potato tubers per lot of 25 tonnes or less shall be taken officially in respect of each lot intended for export to the Union. 2. A lot shall consist only of seed potato tubers of one single variety and class which have been produced on one single establishment and with the same reference number. 3. The samples shall be examined by official laboratories in order to detect any presence of Clavibacter michiganensis . The examinations shall be carried out on the entire sample, using the method for the detection and diagnosis of Clavibacter michiganensis in batches of seed potato tubers as laid down in Council Directive 93/85/EEC ( 3 ) .