Yet more questions, how bothersome.
Yet more temptation to limit any further attempts at a worldbuild from you to bronze age technology.
What is the most powerful non-thermobaric chemical explosive that is allowed for common use (example: HE rounds), wether in actual form or Dust equivalent?
Depends on application.
Are jet turbines/engines which use electric arcs as a heat source instead of fuel or Dust too high-tech? If yes, does that mean that the "extremely low-tech only" previously mentioned for aircraft engines basically stands for "fans of whatever type only"?
Let me put it in a way you can get through your thick fucking skull:
You can use dust, or you can use a fucking hang glider.
What is the allowed use of weapons akin to Penny's Spinning Swords Beam Attack? If allowed (even if only marginally), would they have to directly consume Dust?
Not allowed on Penny's small scale without dickery, and you have been told repeatedly that
no you may not have high non-dust technology so what the fuck do you
THINK the answer to "would they have to directly consume Dust" would be, you fucking moron?
What about regenerating organs by procedures such as 3D printing, applying powdered extracellular matrix, etc.?
How you phrase it? No.
While I'm at it, what would be a general limit on biotech?
Depends how you go about it, and the technology base the worldbuild is descended from.
In terms of medical robots, would a drone with an AI 'capable of pretty much only stopping excessive bleeding, internal or external', be acceptable? Or is that still beyond the realm of the CCT AI?
You're not getting medical robots.
How about quantum encryption, where the encryption and decryption keys are series of quantum objects? (Of course, this means that the encryption and decryption keys must be physically delivered, but makes attempts at interception mildly useless)
Not only no. Not only hell no. Full on FUCK OFF.
You're not getting your non-dust technology powerhouse no matter how you fucking wiggle. Keep wasting my fucking time, and we'll do that bronze age thing.
When I talk about Manned Bi-Pedal Vehicles, I'm not talking about Mechs like the Paladins, but rather weapon platforms like the Sentinels from Warhammer 40K or the ATSTs from Star Wars. From the looks of their designs, they'd be relatively easy to make when comparing them to the Paladins.
On the same topic, would something like the D-Walker from MGS5 be allowed?
There's no hard, "no bipedal robots" but you'll be under very close scrutiny if you're not Atlas.
Limit for materials technology excluding hardlight in Remnant? For example: carbyne, graphene, nanomaterials?
No solid limit, but you're going to be under intense scrutiny. Also, Nathan's warning about bronze age technology applies to you, too.