(1) Commodity rates may be established on different articles for shipment in mixed truckloads and will be the applicable rate for such mixtures.

(2) Minimum truckload weights should be specified together with a statement in connection with the commodity description that the rates apply when shipped in mixed truckloads.

(3) Such rates may also be made applicable upon straight truckloads of one or more or all of the articles by provision to that effect in connection with the commodity description.

(4) When more than one article is included in an item or commodity description, the tariff must specifically state whether or not the rates apply on straight or mixed truckloads or both.