; and (B) be available in addition to any other funding available for similar purposes under any other Federal, State, local, or Tribal program. (e) Definitions In this section: (1) Eligible airport The term eligible airport means an airport holding an Airport Operating Certificate issued under part 139. (2) Part 139 The term part 139 means part 139 of title 14, Code of Federal Regulations. (3) PFAS replacement program The term PFAS replacement program means the program established under subsection (a).