Final answer:
To tow a heavy trailer over 4600 kg without air brakes, a special license is typically required due to commercial towing regulations. A brake controller may also be needed for safe stopping.
Step-by-step explanation:
If you want to tow a trailer that weighs more than 4600 kg, and neither the trailer nor your towing vehicle has air brakes, you would most likely need a special license. The weight of the trailer suggests that it may fall under commercial towing regulations, which typically require additional certification or endorsements on a driver's license. A brake controller might also be necessary because it helps manage the electronic brakes on a heavy trailer, ensuring they are synchronized with the towing vehicle for safe stopping. While a weight distribution hitch can be beneficial for balancing the load and improving control, it is not a legal requirement. Reflective tape increases visibility on the highway, but it is generally not a specific requirement for towing trailers of a certain weight.