This subchapter applies to all domestic life and accident and health insurers and to all other licensed life and accident and health insurers which are not subject to a substantially similar law or regulation in their domiciliary state. This subchapter also similarly applies to licensed property and casualty insurers with respect to their accident and health business. This subchapter does not apply to assumption reinsurance, yearly renewable term reinsurance or certain nonproportional reinsurance such as stop loss or catastrophe reinsurance.