Hi there,
Not 100% I fully understand your question but to confirm; The 146/RJ does use the Servo Tab method (it's the inner of the two tabs) meaning the Elevator surface itself is only controllable with aerodynamic forces acting on it. If you were meaning "control Locks" (??), there is form of gust lock in that the P1 column engages in the footrest bar, however the elevator surface itself can still be moved. You are correct in saying the elevators normally (but not always) rests downwards (Nose up position) but this is purely to do with the large horn and elevator balance weights. (Or more common at present frozen Type 4 fluid).
Hope this kind of answers your question ....
Regards.