Is using ECQB obligatory for all EASA CAA?

[gundernak]

Hi All,

Can you tell me if is it obligatory to use the European Central Question Bank (ECQB) for an EASA member CAA, or it is just optional and a CAA may use questions from other sources?

How does it work regarding PPL, CPL and ATPL. I mean is there a rule for example that allows using PPL questions from any source, but all ATPL questions must be from the ECQB, or something like this?

Thanks in advance

[RedBullGaveMeWings]

PPL is on national level, CPL/ATPL questions should be from the ECQB.

[gundernak]

Thank you!

And what do you think how many question can be public? As far as I know for example at Austria Austrocontrol publishes 75% of their qustions.