The amount of depreciation deductible from the book cost or value is apportioned among the operations in proportion to the separation of the cost of the related plant accounts.
S.D. Admin. R. 20:10:28:12
General Authority: SDCL 49-1-11, 49-31-5, 49-31-18.
Law Implemented: SDCL 49-31-18.
Telecommunications property, general, 47 C.F.R. § 36.102(c) (1991).