An insurer may invest in negotiable bills of exchange or time drafts issued and unconditionally guaranteed by any bank, bank and trust company, national bank association, or domestic branch or agency of a foreign bank subject to reserve requirements under section 7 of the International Banking Act of 1978, as amended, provided that:
(1) The underlying transaction involves a trade financing and has a maturity no longer than six (6) months sight to run exclusive of days of grace;
(2) The insurer invests not more than twenty-five percent (25%) of its assets in bankers acceptances; and
(3) The insurer invests not more than ten percent (10%) of its assets in any one (1) bankers acceptance in any one (1) financial institution.