Apologies in advance, perhaps this a JSON schema question or my mis-understanding, but I am little confused to how one handles more complex forms in the sense if say an applicant is under 16, a guardian form is then required.

Can that be described in JSON schema, or is that some tweak I can make with react-jsonschema-form?

I can see from http://stackoverflow.com/a/11652478/4534 that you can make things required-if but not visible-if.