All other customer services expenses shall be apportioned among the Interexchange category, the billing and collection category and all access elements based on the combined expenses in §§ 69.404 through 69.407 .
47 C.F.R. §69.408
All other customer services expenses shall be apportioned among the Interexchange category, the billing and collection category and all access elements based on the combined expenses in §§ 69.404 through 69.407 .
47 C.F.R. §69.408