I am working on a site for a middle school on-line newspaper and am trying to create a workflow that will allow student writers to create stories that student editors edit and ultimately teacher-sponsors approve for publication.

[Note: I realize that there is a workflow module in development, but since I'm new to Drupal I'm not brave enough to install the cvs version just to use that module, nor am I inclined to jump in with the back-ported version mentioned here. Alas, circumstances won't allow me to wait for 4.7...]

Anyway, so far so good. I have categories set up, with taxonomy_access handling the various stages along the way. Where I'm stuck now is how to make it so that once an editor submits a story for approval by the teacher for publishing, we don't want the original author (or any student) to be able to go back in and edit that story.

So, my question is: How do I go about "locking" a story against editing by the original author once that story has been assigned a certain taxonomy term?

Thanks!

Tom