As used in this chapter, unless the context otherwise requires:(1) 'Agency' means every department or organization described in chapter 3 of this title; and(2) 'Agency action' includes any action by an agency or subdivision thereof that may have substantial economic impact upon any person. Substantial economic impact may occur through a related series of agency decisions that individually may not have substantial economic impact, but that cumulatively have substantial economic impact.Acts 1979, ch. 215, § 3; T.C.A., § 4-3303.
Tennessee Legal Code