49 C.F.R. § 1242.04 Special tests.
Title 49 - Transportation
When the separation of common expense accounts between freight and passenger services is based upon special tests or service unit factors, such tests shall be made at sufficiently frequent intervals to represent actual operating conditions. The service unit factors used are those of the reporting period.
Title 49: Transportation
PART 1242—SEPARATION OF COMMON OPERATING EXPENSES BETWEEN FREIGHT SERVICE AND PASSENGER SERVICE FOR RAILROADS
General
§ 1242.04 Special tests.
