Can't hide Empty and Required field

Hi,

The State/Province field is set to Required and conditionally shown according to Country field selection (empty/not empty)
The Parameters->Query work fine and if the Country selected has no State/Province, there is no value in it.
So far, so good.

The problem is that I need this field to remain Required in case there is a State and be hidden (required or no required seems irrelevant since it will be hidden) when empty (No State).
Configuration ->User Profile->Show Empty Fields is set to No but I don't also see a similar option in Configuration->Registration which is actually where I am facing the issue.
A conditional hide to the field itself does infinite loop and it is forced to a static condition to avoid Javascript errors (debug message).

You'll have to use CB Conditional for that. The below should be sufficient.

Display: Field conditional show
Field: Country
Operator: Not Empty

A conditional hide to the field itself does infinite loop and it is forced to a static condition to avoid Javascript errors (debug message).

I can't see any reason this would create an infinite loop unless State was conditioning itself. Please provide any JS errors you're seeing with the above condition.

I think you have missed the issue and that's probably my mistake.

State/Province is a required field

First case
Region->Northern America (Americas)
Country->United States
State/Province-->Connecticut

First case works fine and I can move to the next step as the required fields are filled.

Second case
Region->Polynesia (Oceania)
Country->Niue
State/Province--> No state

The second case doesn't allow me to go on as the field is required and it is not accepting empty

So the solution would be to hide when empty and show when non-empty, correct?

Concerning you answer "I can't see any reason this would create an infinite loop unless State was conditioning itself. Please provide any JS errors you're seeing with the above condition." on "A conditional hide to the field itself does infinite loop and it is forced to a static condition to avoid Javascript errors (debug message)." You are correct, my mistake, State was conditioning itself.

The second case doesn't allow me to go on as the field is required and it is not accepting empty

You can't select an empty value if the field is marked required. That's working as expected. Don't mark State required and that'll solve your issue.

So the solution would be to hide when empty and show when non-empty, correct?

No, a field can't condition itself. That would create an infinite loop. Don't mark State required as you're wanting to accept None thus the field is not actually required.

But then the user will be able to leave the field empty even if there is a State and in my case it is very important to know the State the user lives.

Is your issue that the country selected has no states or provinces and is thus empty? That'd be a completely separate issue we'd need to try to address. Are you using CB Query Field for this chain of fields?