Comment 2 for bug 1472594

That's it ! - validation ... Totally forgotten this word, lol :-)))

That's a good puzzle - validation function for quota values. Was thinking of it too, but it's not so obvious, requires some case/conditon modeling.
As to "complex_quota" update - current logic (as far as I understood) is: Set quota value - set questions restrictions - set sample restrictions - apply Quota (smth like limit N cases where {X} question restrictions have {Y}sample restrictions).

Would be nice to have some short wiki for current quota instrument especially for conditional logic that might be realized with it .

Thanks,
Alex