Seriously, no instructions.  Sure looks like a legal sized form (8 1/2" x 14").  Do you know how many people will print it on letter sized paper?  A lot.  Do you know how many the SOS will reject?  All of them.  Usually there are statuatory specifications for margin setting as well.  Fall just outside them---rejected.  And nothing on the back?  That is nice.  In Arizona the petition gatherer must certify each form.  Either way just a waste of time IMHO if you aren't going to do it right.