Additional measures applicable in relation to units of protected crop production
13. An authorisation under paragraph 11 may—
(a)in relation to potato production, specify that only certified seed potatoes or mini-tubers or micro-plants derived from officially tested sources may be used in the production;
(b)in relation to tomato production, specify that only seed which meets the requirements of Directive 2000/29/EC or, if vegetatively propagated, tomato plants produced from seed which meets the requirements of Directive 2000/29/EC and grown under official control, may be used in the production;
(c)prohibit any irrigation or spraying programme at the place of production;
(d)specify how any irrigation or spraying programme at the place of production must be carried out for the purpose of preventing the spread of Potato brown rot.