Saving Document within Link into Pages format

I want to save this document so I can work on it within Pages but every time I save it, it simply becomes a large image within Preview where I cannot edit or add text. I've tried saving it with .pages but it's not compatible or something, it takes me to a blank page on Pages. I can add text boxes within Preview, but the font doesn't scale right and it looks unprofessional. Since this document is rather important, I need to keep the format of the original document exactly the same.

Here is the link to the document http://www2.ucsc.edu/judicial/AppealReqCover.pdf

Any help is greatly appreciated

 

Is there really no other way around this? Nothing simple and painless?