I agree that using a character style and the StyleRef field is the approach I would use. Welcome to the world of fields. Paul has several excellent tutorials on them here:

• Microsoft Word Field Maths Tutorial
• Date Calculation Tutorial
• Word Fields and Relative Paths to External Files
• Catalogue/Directory Mailmerge Tutorial

This page will give you links to more on fields: Using Fields in Microsoft Word



Remember that to view field codes, you can use Alt+F9 to toggle their display. Remember to toggle back to field code results.


Here is a compendium of other ways to replicate information in a document. Repeating Data (Populating Multiple Like Fields)

My current favorite is using a document property content control (not field) so that a change made anywhere in a document is reflected in the other document properties. If you go to that article, search for document property. The article is long and very much worth reading.