Lucy:
The ballast trailers Rik pulls have command steering as well - in fact, on bad days, they steer the trailer by hand themselves, from the driving seat, while also steering the unit. I did ask him how the hell they do that, and the answer was “slowly”.They definitely call them positive steer, though. shrugs
You are not entirely wrong.
Most trailers which are equipped with Command Steering, are also fitted with positive steering.
However, not all positively steered trailers are fitted with Command Steering.