This section applies to each individual, group, or blanket health insurance policy or certificate that is delivered or issued for delivery in the State by an insurer or nonprofit health service plan on or after July 2, 1969. A policy or certificate subject to this section may not exclude payments or benefits for the treatment of tuberculosis, mental illness, or another illness covered under the policy or certificate because treatment is received in a hospital or other institution of the State or of a county or municipal corporation of the State, whether or not the hospital or other institution is deemed charitable.