A company authorized to transact the business of life insurance may grant annuities. An annuity is a contract issued for a valuable consideration under which the obligations are assumed with respect to periodic payments for a specified term or terms or where the making or continuance of all or of some of such payments, or the amount of any such payments, is dependent upon the continuance of human life. Such a contract which includes extra benefits of the kind set forth in subdivisions 3301(a)(1) and (2) of this title relating to life and health insurance shall nevertheless be deemed to be an annuity if such extra benefits constitute a subsidiary or incidental part of the entire contract. (Added 1967, No. 344 (Adj. Sess.), § 1 (ch. 2, subch. 1, § 17).)