; (2) procedures for hearing and the presentation of evidence; (3) procedures to assist a person in submitting and pursuing a claim under this title; and (4) other matters determined appropriate by the Secretary. 3404. Definitions In this title: (1) Firefighter The term firefighter means a member of a civilian or military fire department or volunteer fire organization who is qualified to respond to and extinguish fires. (2) Heir The term heir means, in relation to a deceased individual, an individual who, at the time of death of the deceased individual, was a spouse, parent, child, grandchild, or sibling of the deceased individual. (3) PFAS The term PFAS means per- and polyfluoroalkyl substances. (4) PFAS-related health condition (A) In general The term PFAS-related health condition means an illness or health condition for which exposure to PFAS is likely to be a significant factor in aggravating, contributing to, or causing the illness or health condition, including— (i) cancers of the kidney, testicle, liver, prostate, bladder, pancreas, breast, colon, and ovary; (ii) thyroid diseases; (iii) ulcerative colitis