83 Ill. Adm. Code 525.20
Definitions
Section 525
Section 525.20 Definitions
"Base period" shall mean the effective month or the
remaining months in the reconciliation year which includes the effective month.
"Effective month" shall mean the month following
the filing month, during which the Gas Charge(s) will be in effect.
"Filing month" shall mean the month in which a Gas
Charge(s) is determined by the utility and filed with the Commission.
"Gas used by the utility" shall include all gas
used by the utility except gas utilized in the manufacture of gas through a
reforming process, and shall include gas furnished to municipalities or other
governmental authorities without reimbursement in compliance with franchise,
ordinance or similar requirements.
"Reconciliation year" shall mean the 12-month
period defined in each utility's tariff for which actual gas costs and
associated revenues are to be reconciled.
"System average cost of gas" shall mean the
weighted average cost per therm of gas estimated to be purchased, withdrawn
from storage, and manufactured during the base period or reconciliation year.