Final answer:
The insured must wait 60 days for the accident and health insurer to decide on their claim after submitting written proof of loss. The requirement for larger employers to provide notice before plant closures or layoffs is not related to this process.
Step-by-step explanation:
The insured must now wait 60 days before the accident and health insurer is required to provide a decision regarding the claim. This waiting period allows the insurer ample time to review the written proof of loss and make an appropriate decision on whether to approve or deny the claim based on the terms of the policy and the details of the loss incurred by the insured.
The information provided about the requirement for employers with more than 100 employees to provide written notice 60 days before plant closings or large layoffs is related to the Worker Adjustment and Retraining Notification (WARN) Act and does not directly pertain to the insurance claim process in question.