Interexchange carrier billing inquiry includes expenses related to the handling of interexchange carrier billing inquiries. Based on the relative number of actual contacts, weighted, if appropriate, to reflect differences in the average work time per contact, intrastate interexchange carrier billing inquiry expenses are assigned to the subcategories of intrastate special access and private line, intrastate switched access and message toll including WATS, and intrastate billing and collection. These subcategories are assigned as follows:
S.D. Admin. R. 20:10:28:114
General Authority: SDCL 49-1-11, 49-31-5, 49-31-18.
Law Implemented: SDCL 49-31-18.
Category 1, local business office expense, 47 C.F.R. § 36.377(a) (1991).