You will require this authorisation if you intend to operate an establishment that is used for conducting tests on the growing of specified plant varieties.
Applicants for a plant breeder's certificate are sometimes required to undergo a test growing or further test growing of the variety of plant which their application relates to. Using a centralised testing centre is one method of undertaking these tests.
Centralised testing centres (CTC) will establish, conduct and report each trial on behalf of the applicant.