83 Ill. Adm. Code 712.3100
Account 3100 Accumulated Depreciation
Section 712
Section 712.3100 Account
3100 Accumulated Depreciation
a) Cost Pool: Cost pool equals Subaccount by major asset
category
b) Cost Pool Apportionment Basis: Same as Subaccount
c) Regulated/Nonregulated Apportionment Basis: Relative
investment value of major asset category
d) Cost Definition: Indirectly attributable