I would say (Greg to confirm/deny) that it's OK to submit such clearances, but perhaps wait until November. Maybe mention in one of the notes-to-clearance-team fields that
the finished ebook won't be submitted to PG until Jan/2020.
DPCanada has a similar general policy.
DPCanada/Fadedpage (https://www.fadedpage.com/)
should also be checked, just in case the book is already there. (DPC follows Canadian copyright law, not American.) DPC has a copyright clearances spreadsheet (similar to David Price's In-progress list) at:
Green entries are projects that have been posted to Fadedpage; black ones are active DPC projects. (Be patient--the sheet can take a bit of time to load and respond.)
Al
I seem to remember that you start accepting clearance requests a bit ahead of time -- end-of-year 2019 look-ahead for "2020" [1924] items?
When can we start submitting
clearance requests for "2020"
[1924] items -- realizing that these don't actually "clear" until 2020?
Thanks, jimad