Could this be submitted as MathML?
  Is the equation font size proportionate across entire submission?
  Superior and inferior text is no less than 7 points in height, when viewed at actual size.
            Example:
  THIS IS 7 POINT TEXT.
  Regular text is no less than 10 points in height.
            Example:
   THIS IS 10 POINT TEXT.
  Resolution is 500 dpi or more at intended display size.
  Image areas are not pixilated or "stair stepped".
  Text is legible and of a high quality.
  All text that was in the PDF is present in the digital image file submission.
  Any lines in the graphic are no smaller than 1-point width.
            Example:  
  The quality of the graphic is the same as, or better than, the PDF.
  Two column equations should be split into 2 parts or stacked.