The competent authority, or the professional operator under the official supervision of the competent authority, shall carry out checks and take any other actions to ensure that the following requirements are fulfilled concerning the presence of RNQPs on seed of Solanum tuberosum:
the seeds originate in areas where Potato spindle tuber viroid is not known to occur; or
no symptoms of diseases caused by Potato spindle tuber viroid have been observed on the plants at the place of production during their complete cycle of vegetation; or
the plants have been subjected to official testing for Potato spindle tuber viroid, on a representative sample and using appropriate methods, and have been found, in these tests, free from that pest.