This section applies to: each group or blanket health insurance policy that is issued or delivered in the State and provides coverage on an expense-incurred basis; and each group medical or major medical contract or certificate that is issued or delivered in the State by a nonprofit health service plan. Each policy, contract, or certificate subject to this section shall provide a benefit that allows the addition of a certificate holder’s or subscriber’s dependent children to the certificate holder’s or subscriber’s policy or contract at any time and without evidence of insurability if: the dependent children previously were covered under the policy or contract of the certificate holder’s or subscriber’s spouse; and the certificate holder’s or subscriber’s spouse has died. This section applies regardless of whether a certificate holder’s or subscriber’s dependent children are eligible for any continuation or conversion privileges under the policy or contract of the certificate holder’s or subscriber’s spouse. Within 6 months after the death of the spouse, the certificate holder or subscriber must exercise the benefit provided under this section.