In this Act, "automobile" means an automobile as provided in Article 2, subparagraph 8 of the Highway Act, or any other motorized machinery driven on a road. "Motorcycle," as used in Articles 38 and 49, is also an automobile as defined in Article 2, subparagraph 8 of the Highway Act. In addition to the vehicles given in the two preceding paragraphs, "automobile" also includes specified overland motorized vehicles that do not run on rails and have a transport function; the range of vehicles to be included in this category and the automobile categories for which the establishment of a contract for this insurance is required will be prescribed and announced by the competent authority in conjunction with the central competent authority for transportation and communications.