Section 8. Any person, employer, labor organization or employment agency, who or which shall wilfully resist, prevent, impede or interfere with the commission or any of its members or representatives in the performance of duty under this chapter, or shall wilfully violate a final order of the commission shall be punished for each offense by imprisonment for not more than one year, or by a fine of not more than five hundred dollars, or by both; but procedure for the review of the order shall not be deemed to be such wilful conduct.