51. For the purposes of this Chapter, the following persons are deemed to be owners: any person who acquires or possesses a school bus or a school minibus or a vehicle used for the transportation of school children under a title of ownership involving a condition or term giving him the right to become the owner thereof, or under a title giving him the right to use it as the owner thereof charged to deliver over.
The same applies to a person who leases a road vehicle referred to in the first paragraph for a period of at least one year.