Del. Code Ann. tit. 18, § 1112
(a) Policies and contracts issued prior to the operative date of the valuation manual. — (1) The Commissioner shall annually value, or cause to be valued, the reserve liabilities (hereinafter called reserves) for all outstanding life insurance policies and annuity and pure endowment contracts of every life insurance company doing business in this state issued on or after 1968 and prior to the operative date of the valuation manual, except that in the case of an alien insurer such valuation shall be limited to its insurance transactions in the United States. In calculating reserves, the Commissioner may use group methods and approximate averages for fractions of a year or otherwise. In lieu of the valuation of the reserves required of a foreign or alien company, the Commissioner may accept a valuation made, or caused to be made, by the insurance supervisory official of any state or other jurisdiction when the valuation complies with the minimum standard provided in this Act.
(b) Policies and contracts issued on or after the operative date of the valuation manual. — (1) The Commissioner shall annually value, or cause to be valued, the reserve liabilities (hereinafter called reserves) for all outstanding life insurance contracts, annuity and pure endowment contracts, accident and health contracts, and deposit-type contracts of every company issued on or after the operative date of the valuation manual. In lieu of the valuation of the reserves required of a foreign or alien company, the Commissioner may accept a valuation made, or caused to be made, by the insurance supervisory official of any state or other jurisdiction when the valuation complies with the minimum standard provided in this Act.