When not specifically classified in the governing classification or specifically described in this tariff, articles which have been combined or attached to each other will be charged for at the rate provided for the highest rated article of the combination. On a shipment subject to volume rates, the minimum weight will be the highest minimum weight provided for any article in the combination.

When articles have been combined with or attached to vehicles, motor, or vehicles other than self-propelled, they will be rated as a combination article unless the combined article is specifically provided for in NMF 100 or in tariffs making reference to this tariff.