Improper use of number plate / use plate not authorized for vehicle....something in that area...without looking it up.
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HTA OREG 628
13.1 (1) Upon filing satisfactory evidence as to the need for it, a Service permit and number plate may be issued to a person engaged in the business of repairing, customizing, modifying or transporting trailers or motor vehicles other than motorcycles and motor assisted bicycles or to a person engaged in the business of manufacturing or selling trailers. O. Reg. 367/04, s. 3 (1).
(2) A Service number plate may be used on a trailer or motor vehicle other than a motorcycle or motor assisted bicycle only,
(a) for purposes related to the repair, road testing, customization or modification of the vehicle, if the vehicle is in the possession of the person to whom the Service permit corresponding to the Service number plate is issued; (OWNERSHIP changed over)
(b) for the purpose of transporting the vehicle by a person engaged in the business of transporting vehicles;
(c) for purposes related to the manufacture or sale of a trailer; or
(d) for the purpose of towing the vehicle by a person engaged in the business of transporting vehicles,
(i) to a location where its load will be removed as required by section 82.1 of the Act, or
(ii) to an impound facility pursuant to subsection 82.1 (19) of the Act. O. Reg. 367/04, s. 3 (1).
(3) A Service number plate may be used only on a commercial motor vehicle owned by or in the possession of the person to whom the Service permit corresponding to the Service number plate is issued and only,
(a) for purposes related to the repair, road testing, customization or modification of the commercial motor vehicle; or
(b) in the case of a person engaged in the business of transporting commercial motor vehicles, for purposes of transporting the commercial motor vehicle. O. Reg. 367/04, s. 3 (1).
(4) A Service number plate shall not be used on a vehicle, including a commercial motor vehicle, that is kept for private use or for hire. O. Reg. 367/04, s. 3 (1).
(5) Except as permitted by subclause (2) (d) (i), a Service number plate shall not be used on a commercial motor vehicle or trailer that is loaded with goods
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Out of all that...can not use a service plate for private use of the vehicle, registration/ownership of the vehicle has to have the same registered name to the service plate. If it's a commercial vehicle it can NOT have a load of any kind.