83 Ill. Adm. Code 712.290
Billing and Collection Study
Section 712
Section 712.290 Billing and
Collection Study
A study, completed at least
annually, is required to apportion customer billing and collection costs to
regulated and nonregulated activities. This study is used to apportion selected
cost pools in Account 6620 Services. This study shall distinguish the nonregulated
proportion of the key determinants of customer billing and collection:
messages or billing units and lines of billing.