"Permanent rates" are established by the Commission at the conclusion of a rate case conducted under Section 9-201 of The Public Utilities Act ("Act") (Ill. Rev. Stat. 1985, ch. 1112/3, par. 9-201).
"Temporary rates" are established by the Commission after hearing for an interim time period to be in effect until permanent rates are approved and in effect, pursuant to Section 9-202(b) of the Act (Ill. Rev. Stat. 1985, ch. 1112/3, par. 9-202(b)).
Ill. Admin. Code tit. 83, § 330.10