13.8.1 says to put notes to poems at the end of the poem or stanza. Hypothetically, suppose a stanza is split between print pages and there are notes on the first print page. I'm assuming the notes should still be placed just before the page change indicator for the second page, even though it is not the end of the stanza. Correct?
13.8.1 clearly says to place notes to poems at the end of the bottom of the print page following the note separation line. The guideline goes on to say that a blank line is inserted between the end of a stanza or the end of the poem and the separation line. This means that if the entire poem (or just the stanza) ends on that print page, insert a blank line before the note separation line and then transcribe the notees as usual following the separation line. That extra blank line tells the reader that the poem (or stanza) ends on that page.