; and (B) a survivor of a veteran who was awarded dependency and indemnity compensation for the death of a veteran resulting from the illness on the basis of the presumption before that date shall continue to be entitled to receive dependency and indemnity compensation on that basis. (c) Effective date of benefit awards The effective date of any benefit awarded by reason of this section shall be determined in accordance with section 5110 of title 38, United States Code, but shall in no case be earlier than the effective date of the final regulations prescribed pursuant to subsection (b)(2). (d) Definitions In this section: (1) The term covered study includes— (A) the study conducted by the National Academies of Sciences, Engineering, and Medicine titled Respiratory Health Effects of Airborne Hazards Exposures in the Southwest Asia Theater of Military Operations ; and (B) any subsequent study conducted by the National Academies of Sciences, Engineering, and Medicine regarding the effects of exposure of humans to toxic airborne chemicals and fumes caused by open air burn pits and other airborne hazards. (2) The term covered veteran means a veteran who, on or after September 11, 2001— (A) was deployed in support of a contingency operation while serving in the Armed Forces; and (B) during such deployment, was based or stationed at a location where an open burn pit was used. (3) The term open burn pit means an area of land that— (A) is designated by the Secretary of Defense to be used for disposing of solid waste by burning in the outdoor air