Assuming full technical responsibility would probably make most AI-generated code pointless, as the whole point of using AI this way is that generating code saves work. Which is not any more the case if the result is really fully reviewed.

When you submit code that you write you take responsibility for it, irregardless of the tools you use. AI generated code should not be different in this aspect.
You can use AI to generate code but you should review it anyway, at least at the basic level to make sure that it does not contain obvious bugs and do what it is supposed to do.

The other thing is there is no way one can declare AI generated code safely free of copyright isses. You’d need to prove that the result code was not contained in the training data - which is not possible.

Which itself should make people to avoid to use AI generated code for anything else than playing around.