18 C.F.R. §§ 367.4581–367.4583

This account must include those direct costs that can be identified through a cost allocation system as being applicable to services performed for non-associate companies. This account must not include any compensation for use of equity capital or interest on indebtedness.

This account must include recovery of those indirect costs of services performed for non-associate companies that cannot be specifically assigned and therefore must be allocated. This account must not include any compensation for use of equity capital or inter-company interest on indebtedness.

This account must include only the portion of compensation for use of equity capital and inter-company interest on indebtedness before income taxes that is properly allocable to services rendered to non-associate utility companies. A statement to support the basis for the compensation and how it was calculated must be attached to a separate journal entry, ledger system, or memorandum file.