With effect from 1 January 1993 , Member States shall organise official checks to ensure compliance with the provisions of this Directive , in particular with Article 10(2 ) , which shall be carried out at random and without any discrimination in respect of the origin of the plants , plant products or other objects , and in accordance with the following provisions:- occasional checks , at any time and at any place where plants , plant products or other objects are moved,- occasional checks on premises where plants , plant products or other objects are grown , produced , stored or offered for sale , as well as on the premises of purchasers,- occasional checks at the same time as any other documentary check which is carried out for reasons other than plant health .