Del. Code tit. 18, § 1120

For accident and health insurance contracts issued on or after the operative date of the valuation manual, the standard prescribed in the valuation manual is the minimum standard of valuation required under § 1112(b) of this title. For disability, accident and sickness, accident and health insurance contracts issued on or after 1968 and prior to the operative date of the valuation manual the minimum standard of valuation is the standard adopted by the Commissioner by regulation.