(a) meets the minimum qualification standards prescribed by the commissioner for such purpose and successfully completes the basic course of training and passes an examination demonstrating successful completion of such course prescribed by the commissioner;
(b) meets the minimum qualification standards established by the commissioner for appointed assessors and passes an examination conducted by the commissioner for this purpose; or
(c) possesses a professional designation as described in paragraph (b) of subdivision three of section three hundred eighteen of this title and the commissioner, in its discretion, waives any of the courses of training or examination. 2. Such certification shall specify that such person is eligible for the position of assessor in accordance with the classification of assessing units established by the commissioner pursuant to subdivision one of section three hundred eighteen of this title. Certification as eligible for the position of assessor shall be for a period of three years and may be renewed after the expiration of this period with or without examination in accordance with regulations established by the commissioner. Upon request by an assessing unit, the commissioner shall provide a list of candidates certified as eligible for the position of assessor pursuant to this section.