Competent authorities shall perform official controls at least once per year in the premises and, where applicable, in other locations used by professional operators authorised to issue plant passports in accordance with Article 84(1) of Regulation (EU) 2016/2031.
Those controls shall include inspections and, in the case of suspicion of risks to plant health, the sampling and testing referred to in Article 92(1) of Regulation (EU) 2016/2031.
Those controls shall be carried out at the most appropriate time with regard to the possibility of detecting the presence of relevant pests or signs or symptoms thereof.