§ 51. Posting of notice regarding compensation. Every employer who has complied with section fifty of this article shall post and maintain in a conspicuous place or places in and about his place or places of business typewritten or printed in English and Spanish notices in form prescribed by the chairman, stating the fact that he has complied with all the rules and regulations of the chairman and the board and that he has secured the payment of compensation to his employees and their dependents in accordance with the provisions of this chapter, but failure to post such notice as herein provided shall not in any way affect the exclusiveness of the remedy provided for by section eleven of this chapter. Every employer who owns or operates automotive or horse-drawn vehicles and has no minimum staff of regular employees required to report for work at an established place of business maintained by such employer and every employer who is engaged in the business of moving household goods or furniture shall post such notices in each and every vehicle owned or operated by him. Failure to post or maintain such notice in any of said vehicles shall constitute presumptive evidence that such employer has failed to secure the payment of compensation. The chairman may require any employer to furnish a written statement at any time showing the stock corporation, mutual corporation or reciprocal insurer in which such employer is insured or the manner in which such employer has complied with any provision of this chapter. Failure for a period of ten days to furnish such written statement shall constitute presumptive evidence that such employer has neglected or failed in respect of any of the matters so required. Any employer who fails to comply with the provisions of this section shall be required to pay to the board a fine of five hundred dollars for each violation, in addition to any other penalties imposed by law to be deposited into the uninsured employers' fund.