SECTION 21. Limitation of amount insured in single risk; penalty

No company other than a life company shall insure in a single risk an amount larger than ten percent of its surplus to policyholders, unless it has reinsured, as provided in section twenty, the excess over said limit to take effect simultaneously with the original contract. A company violating this section shall be punished by a fine of five thousand dollars for each day during which such violation continues.