Hi, LaVerne!
Thank you for the question. No, you may not have different box lines.
If technical material immediately precedes a box that is all in Nemeth Code, begin Nemeth Code before the technical material preceding the box, and terminate Nemeth Code after and outside the box.
Also:
If technical material follows immediately after a box that is all in Nemeth Code, begin Nemeth Code before and outside the box, and terminate Nemeth Code after the technical material following the box.
Lastly, if technical material both immediately precedes and follows a box that is all in Nemeth Code, begin Nemeth Code before the technical material that precedes the box, and terminate Nemeth Code after the technical material that follows the box.
–Kyle