N.Y.C. Admin. Code § 13-354: § 13-354 Certain disabilities of firefighters.

Notwithstanding any other provisions of this code to the contrary, any condition of impairment of health caused by diseases of the lung, resulting in total or partial disability or death to a member of the uniformed force, who successfully passed a physical examination on entry into the service of such department, which examination failed to reveal any evidence of such condition, shall be presumptive evidence that it was incurred in the performance and discharge of duty, unless the contrary be proved by competent evidence.