§ 7605. Quarterly returns. With respect to each fund subject to this article, every insurer on or before the fifteenth days of February, May, August and November of each year, shall file, with the commissioner and the superintendent identical returns, subscribed and affirmed by the insurer to be true under the penalties of perjury, on a form prescribed by the superintendent, stating the amount of net direct written premiums charged by such insurer during the quarter year ending on the last day of the second month preceding that in which the report is required to be filed.