When something ends on line 24 or 25 of a braille page that requires a blank line following it, that blank line should be at the top of the next braille page.  If there is a running head, that means on line 3, if no running head, line 2.  I know that BF is a bit unclear regarding this point – a clarification is being written (subject to BANA approval) in a errata that is currently being worked on.

Cindi