Council Directive of 8 December 1969 on control of Potato Wart Disease (69/464/EEC)

Article 3

The Member States shall provide that potato tubers and haulms which came from contaminated plots be treated in such a way that the harmful organism is destroyed. If it is no longer possible to determine the place from which contaminated tubers and haulms came, the whole of the batch in which the contaminated tubers or haulms have been found must be treated.