Make text permanent in Microsoft Word 2010, how?

[shaunzo101]

I need to know how to make previously saved text in a word document uneditable, but still have the ability to add more text into the document.
Example:


I am keeping records of an event. I have previously recorded notes about the event, but i do not want to have the ability to edit these previously made notes. But i also want to have the ability to add further notes after these 'permanent' notes. And once i have finished adding my further notes i want these to become permanent as well.
How can this be achieved?