The expenses in this account are apportioned among the operations on the basis of an analysis of current billing for a representative period, excluding current billing on behalf of others and billing in connection with intercompany settlements. Effective July 1, 2001, through December 31, 2024, all study areas shall apportion expenses in this account among the jurisdictions using the analysis during the twelve-month period ending December 31, 2000.

[79 FR 36238, June 26, 2014]