Does ZWave commands bridging require devices to be on the same security level?

There are two facts which make me wondering with an interesting question.
Here are the facts:

  1. Zwave devices can work like bridges to the remote devices which can't be reached by the hub
  2. Devices that are included in the network with a different security level (unsecured, S0, S2, and their variations) can't work in associations. Which basically makes them relay their state to other devices without involving the HUB.

And the question is:
Do all devices have to be on the same security level in order to pass commands between the HUB and remote switches?

No. That being said, not all first generation powered zwave devices (300 series chips) support beaming, the latter being desirable for sleepy devices to receive commands.