Depending on what you're trying to achieve, you can use 'filling in forms' protection with either formfields or content controls, including the use of unprotected sections for free input/editing, or you can use 'No Changes (read-only)' restrictions with (or without) content controls. The former is more restrictive, but works with Word 2003 & earlier.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]