1. Short title This Act may be cited as the Protection for Veterans’ Burn Pit Exposure Act of 2019 . 2. Determination of presumptions of service connection for illnesses associated with open burn pits (a) In general (1) Determination required Not later than 60 days after the date on which the Secretary of Veterans Affairs receives the results of a covered study, the Secretary shall make a determination whether a positive association exists between— (A) the exposure of humans to toxic airborne chemicals and fumes caused by open air burn pits and other airborne hazards; and (B) the occurrence of a diagnosed illness in humans. (2) Bases of determination In making a determination under paragraph (1), the Secretary shall consider— (A) whether the evidence is statistically significant, capable of replication, and able to withstand peer review demonstrating that there is positive association between the exposure and the occurrence of a diagnosed illness; (B) the results of a covered study; and (C) all other sound medical and scientific evidence available to the Secretary. (3) Presumption If the Secretary determines that a positive association exists between exposure and a diagnosed illness pursuant to paragraph (1), the Secretary shall prescribe regulations providing that— (A) a presumption of service connection is warranted for the illness covered by that determination if the illness first becomes manifest within the period, if any, prescribed in such regulations in a covered veteran; and (B) such covered veteran shall be presumed to have been exposed to toxic airborne chemicals and fumes caused by open burn pits unless there is conclusive evidence to establish that— (i) the covered veteran was not exposed to toxic airborne chemicals and fumes caused by open burn pits in the course of service in the Armed Forces described in subsection (c)(1)