(i) willfully fails to provide the information required by this article for the appropriate time period;
(ii) knowingly provides false information; or
(iii) the purchaser can establish that the merchant willfully and falsely disclaimed knowledge as to any required information.
(b) Pursuant to subparagraphs (i) and (iii) of paragraph (a) of this subdivision, a merchant may introduce evidence of the relevant usage and custom of the trade in any proceeding in which such treble damages are sought. This subdivision shall not be deemed to negate the applicability of article thirteen of this chapter as to authenticity and article thirteen is applicable, as to authenticity, to the multiples covered by the provisions of this article. 4. In any action to enforce any provision of this article, the court may allow the prevailing purchaser the costs of the action together with reasonable attorneys' and expert witnesses' fees. In the event, however, the court determines that an action to enforce was brought in bad faith it may allow such expenses to the art merchant as it deems appropriate. 5. An action to enforce any liability under this article shall be brought within the period prescribed for such actions by article two of the uniform commercial code.