Actually, the new 2011 Formats does address this issue of change of context at the top of a new braille page, but in a different way. The result is just about the same. If there is a change in context, such as the resumption of regular text following a sidebar, there would be a blank line on line 1 just as you have in your sample. A specific guidelines on that is not necessary. If text must be preceded by a blank line, then insert it at line 1 if necessary. Note that there is a specific guideline for headings and open box lines.
Both headings and box lines announce a change of context. Section 4.3 specifically says headings can be placed on line 1 UNLESS THERE IS A RUNNING HEAD, and if so, the heading is on LINE 3, not lint 2, providing for a blank line preceding the heading. This means that the heading is considered enough of a change of context so that it can be line line 1. The guidelines for the boxing line is exactly the same. See Section 7.2. Also see the thread below title Box at top of print page. That one asks the same question from the perspective of boxing lines.
Thank you very much for the print example. It was very helpful.