20:10:29:46Apportionment of corporate operations expenses

in accounts 6710 and 6720. All corporate operations expenses in accounts 6710 and 6720 are apportioned among the special access category, interexchange category, the billing and collection category, and all switched access elements in accordance with the big three expense factor as defined in § 20:10:29:01.

Source: 19 SDR 111, effective January 31, 1993.