How can I activate chapters for added profiles/operations?

If you modify your company's profiling and add operations (e.g. NVIS etc.), the new required chapters in affected documents will not appear automatically in your draft documents. Using "Recreate" where available, won't do the trick, either.
You will have to delete (no changes are lost) the actual draft document or send it in review and reject it. This way, you will obtain the orange "Create draft" button, which when used, will modify the document structure according to your actual profiling.