Each employer shall post and keep posted, in conspicuous places on the premises of the employer where notices to employees and applicants for employment are customarily posted, a notice, to be prepared or approved by the commissioner, setting forth excerpts from, or summaries of, the pertinent provisions of this title and information pertaining to the filing of a complaint. Any employer that willfully violates this section may be subject to a civil penalty of not more than one hundred dollars for each separate offense. Any penalties collected by the department under this section shall be deposited into the family and medical leave enforcement account.