Having not seem the MOS study guide, I can't really say why it's using 'section'; perhaps its a legacy of the formfield days where, to have an editable portion in a protected document, it had to be in an unprotected Section.

As for the problem of applying user-based read-only editing exceptions, you might be able to achieve what you're after by creating a dummy user account on your PC then specifying yourself or that user as the one entitled to do the edits.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]

I tried your suggestion, but it failed to produce any different result. Thanks for the idea, though.