All other, category 3, all other customer services expenses, is apportioned based on categories 1 and 2.
S.D. Admin. R. 20:10:28:121
General Authority: SDCL 49-1-11, 49-31-5, 49-31-18.
Law Implemented: SDCL 49-31-18.
Category 3 - all other customer services expense, 47 C.F.R. § 36.382(a) (1991).