New York Consolidated Laws, Insurance Law - ISC § 3405. Fire insurance contract;  losses from nuclear reaction or radiation

(a) Insurers issuing the standard fire insurance policy pursuant to section three thousand four hundred four of this article are authorized to affix or include in the policy a written statement that such policy does not cover loss or damage caused by nuclear reaction or nuclear radiation or radioactive contamination, all whether directly or indirectly resulting from an insured peril under such policy.

(b) This section shall not prohibit the attachment to any such policy of an endorsement specifically assuming coverage for loss or damage caused by nuclear reaction or nuclear radiation or radioactive contamination.