Where did you get this ?
The court and apparently the law are saying he should have known, by signing the form, that when in the future he came under the order of protection that he had to get rid of his guns.
All the above is to be taken with a grain of salt as I am not a lawyer and could be remembering the ATF form/gun purchase timeline incorrectly.
I also got a link via email that showed the exact forms he signed and another newer form where some wording was changed that might bear in the case when it goes back to trial. Except that they will probably say that he should have known the law anyway.
[You:] Where did you get this ?
My mistake. The relevant question, under the appeals court's ruling, is did he possess a gun after the date of the protective order; and the answer to that question is obviously yes.