'Read Only' Headings

Hello,

Apologies if this has been posted to the wrong newsgroup.

My colleague has a Template Document with a number of Headings that must
remain unchanged, but he wants users to be able to edit the rest of the
document without fear that the Headings are changed deliberately or by
accident. So he wants to make just the headings 'Read-Only' but leave the
rest of the document open to editing.

Is it possible to do this in any way?

Any replies will be welcomed.

Thanks

Phil