((a)) ** .—** The Secretary shall determine whether to establish, or to remove, presumptions of service connection based on toxic exposure pursuant to this subchapter, whereby—
((1)) under —
((A)) the Secretary provides—
((i)) public notice regarding what formal evaluations the Secretary plans to conduct; and
((ii)) the public an opportunity to comment on the proposed formal evaluations;
((B)) the working group established under subsection (b) of such section provides—
((i)) advice to the Secretary on toxic-exposed veterans and cases in which veterans who, during active military, naval, air, or space service, may have experienced a toxic exposure or their dependents may have experienced a toxic exposure while the veterans were serving in the active military, naval, air, or space service;
((ii)) recommendations to the Secretary on corrections needed in the Individual Longitudinal Exposure Record to better reflect veterans and dependents described in clause (i); and
((iii)) recommendations to the Secretary regarding which cases of possible toxic exposure should be reviewed;
((2)) the Secretary provides for formal evaluations of such recommendations under and takes into account reports received by the Secretary from the National Academies of Sciences, Engineering, and Medicine under ; and
((3)) the Secretary issues regulations under .
((b)) ** .—** In this subchapter:
((1)) The term “illness” includes a disease or other condition affecting the health of an individual, including mental and physical health.
((2)) The term “Individual Longitudinal Exposure Record” includes—
((A)) service records;
((B)) any database maintained by the Department of Defense and shared with the Department of Veterans Affairs to serve as a central portal for exposure-related data that compiles, collates, presents, and provides available occupational and environmental exposure information to support the needs of the Department of Defense and the Department of Veterans Affairs; or
((C)) any successor system to a database described in subparagraph (B).