(a) A group accident and health insurance policy must provide that the insurer will furnish to the person making a claim or to the policyholder for delivery to a person making a claim the forms usually provided by the insurer for filing a proof of loss.
(b) If the forms for a proof of loss are not provided before the 16th day after the date the insurer received notice of a claim under the policy, the person making the claim is considered to have complied with the requirements of the policy as to proof of loss on submitting, within the time set in the policy for filing proof of loss, written proof covering the occurrence, character, and extent of the loss for which the claim is made.