This action seeks to set aside a report and order of the Interstate Commerce Commission entered in its Docket No. MC-106398 (Sub-No. 167), National Trailer Convoy, Inc., Extension-Portable Buildings.1 The Commission found that the certificate of National Trailer Convoy, Inc., plaintiff herein, did not authorize the transportation of commodities; referred to as sectionalized homes and! denied National’s request for such authority.
National held various certificates issued by the Commission and granting the right to transport “trailers designed to be drawn by passenger automobiles.” It. applied for a certificate covering five items, viz.: shrimp boats (mobile kitchens or restaurants), egg factories (hen houses), coin operated laundries, motel units, and sectionalized homes. At the hearing and after the examination of its operating witnesses, National moved to dismiss the application on the ground that its existing certificate covered the commodities. The Hearing Examiner *288agreed and recommended dismissal of the application. Upon exceptions by two protestants the Commission affirmed except as to the seetionalized homes. National here complains that the Commission order is arbitrary and capricious and fails to follow Commission precedent on the interpretation of commodity descriptions.
The Hearing Examiner described the commodity in dispute thus:
“[A] portable home which is moved in two units, each completely finished, one containing living room and bedroom and the other containing kitchen, bath, and other appurtenances. These structures are built separately and move on two separate undercarriages equipped with hitch balls. When they arrive at the site they are merely placed together, side by side, and attached to form a completed house approximately 42 by 20 feet. The undercarriages are removed and returned to the shipper.”
In Illinois Trailer Convoy, Inc., Extension, 47 M.C.C. 315, 317, the Commission said that it used the term “trailers designed to be drawn by passenger automobiles” to distinguish between so-called house trailers and commercial trailers, that the term is merely descriptive of the articles to be transported, and that it does not require the motive power to be furnished by a passenger automobile. In the parlance of the industry the house trailer category is referred to as “hitch ball” and the commercial as “fifth wheel” because of the method used in connecting the trailer to the motive power.
In the instant case the Commission said that the primary problem was whether the commodities could be properly described as trailers. It held that the shrimp boats, egg factories, coin-operated laundries, and motel units had the same substantial characteristics as house trailers and were within the category of “trailers designed to be drawn by passenger automobiles.” As to the seetionalized homes the Commission pointed out that they were built in two sections which were joined together to make a house permanently situated at the point of destination. The Commission held that they did not possess the determinative characteristics of house trailers because they were not single units or mobile units and that they were not within National’s operating authority.
The Commission has done no more than construe or interpret a certificate granted by it. The rule is that the interpretation or construction by the Commission of a certificate issued by it will be overturned by the courts only if clearly erroneous.2
In substance the argument of National is that the description “trailers designed to be drawn by passenger automobiles” is a generic term covering all hitch ball type trailers. The difficulty is that the phrase describes a class of trailers. To be within it the commodity must be a trailer.
The Commission has differentiated between shrimp boats, egg factories, coin-operated laundries, and motel units on the one hand, all of which are single units and retain mobility after delivery, and seetionalized homes, on the other hand, which are not single units and which are permanently located after delivery. The commodities in the first group are held to be trailers and those in the second group are not.
National says that intended use is irrelevant and that industrial usage is the criterion for bringing a commodity within a generic description. In the situation presented the industry which manufactures the seetionalized homes has placed them on integrated undercarriages which make unnecessary the loading and unloading of the homes on and off flat bed, fifth wheel type, trailers *289by means of cranes. If this type of construction determines whether a commodity is a trailer, anything built with an undercarriage and a hitch ball is within the category.
National cites many decisions of the Commission relating to the commodity description here under consideration.3 These show that by use of the description the Commission intended to provide a field of service flexible enough to embrace developments in the mobile home industry. They also show that newly developed commodities do not automatically come within the description because of a superficial resemblance or common characteristic. The identity of each new commodity must be examined to determine its proper classification.
Here we have a new commodity which is not built in single units and which is not intended to retain any mobility. The decision of the Commission that it is not a trailer is reasonable and not clearly erroneous. We agree with the government that a half-house in the process of delivery, though moving, is not a trailer but rather is half of a house.
The order of the Commission is affirmed. This opinion sufficiently states the findings of fact and conclusions of law of the court. Further findings of fact and conclusions of law are not necessary. The clerk will enter an appropriate judgment.
. The Commission Report is published at 91 M.C.C. 301.
. Andrew G. Nelson, Inc., v. United States, 355 U.S. 554, 558-559, 78 S.Ct. 496, 2 L.Ed.2d 484; Arrow Trucking Co. v. United States, N.D.Okl., 181 F.Supp. 775, 777.
. For example: Consolidated Freightways Corp. of Delaware, Extension — Petrochemicals, 92 M.C.C. 443; Dealers Transit, Inc., Extension — Augusta, Kansas, 86 M.C.C. 571, 88 M.C.C. 369; Arco Auto Carriers, Inc., Extension — Escanaba, Mich., 86 M.C.C. 555; Leonard Bros. Transfer & Storage Co., Inc. v. Dealers Transit, Inc., 82 M.C.C. 191; and Kenosha Auto Transport Corp., Extension — 21 States, 62 M.C.C. 446.