End user billing inquiry -- Included expenses -- Subcategories -- Assignment of subcategories. End user billing inquiry includes expenses related to handling end users' inquiries concerning their bills. This category does not include expenses related to the inquiries of interexchange carriers concerning their bills.

1. (1) Intrastate private line and special access billing inquiry expense is assigned to toll and other services based on use;
2. (2) Intrastate message toll including WATS billing inquiry expense is assigned to toll services;
3. (3) Other billing inquiry expense, primarily related to local bills but also including directory advertising, is assigned to other services.

Based on the relative number of actual contacts, weighted, if appropriate, to reflect differences in the average work time per contact, end user billing inquiry costs are first segregated into the subcategories of intrastate private line and special access, intrastate message toll including WATS, and other. These subcategories are assigned as follows:

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

General Authority: SDCL 49-1-11 , 49-31-5 , 49-31-18 .

Law Implemented: SDCL 49-31-18 .