N.Y. VOL Law § 14

§ 14. Previous disability. The fact that a volunteer firefighter has\nsuffered previous disability or received benefits therefor as provided\nin section two hundred five of the general municipal law, the workers'\ncompensation law, or this chapter shall not preclude him or her from\nbenefits for a later injury nor preclude death benefits for death\nresulting therefrom; provided, however, that a volunteer firefighter who\nis suffering from a previous disability shall not receive benefits for a\nlater injury in excess of the benefits allowed for such injury when\nconsidered by itself and not in conjunction with the previous\ndisability. Notwithstanding the foregoing provisions of this section, if\na volunteer firefighter has previously incurred permanent partial\ndisability through the loss or loss of use of one hand, one arm, one\nfoot, one leg, or one eye, and suffers the loss or loss of use of\nanother such major member or eye, he or she may be adjudged permanently\ntotally disabled and receive benefits for permanent total disability as\nprovided in section eight of this chapter.\n