It is, with one modification: Unlike old-fashioned legal documents, this one’s written mostly in plain English.
Perhaps needless to say, this was deliberate on the part of Judge Gleeson and his attorneys, so that the document would be as widely accessible as possible.
And on the merits: As noted previously, to disallow Barr’s request Judge Sullivan had to do a fair bit of work to make the case:
Judge Gleeson’s brief does all the work I alluded to.
Which doesn’t mean it will ultimately succeed – but if it fails we’ll know why.