N.Y. Employers' Liability Law § 6: Defense; insurance fund

§ 6. Defense; insurance fund. An employer who shall have contributed

to an insurance fund created and maintained for the mutual purpose of

indemnifying an employee for personal injuries, for which compensation

may be recovered under this article, or to any relief society or benefit

fund created under the laws of this state, may prove in mitigation of

damages recoverable by an employee under this article such proportion of

the pecuniary benefit which has been received by such employee from such

fund or society on account of such contribution of the employer, as the

contribution of such employer to such fund or society bears to the whole

contribution thereto.