Contract formatting

I need a person who understands how to use toggle field codes in a legal document so that the document will have cross references that can be updated when I change its content. Please note, this is not the same skill as the ability to insert cross references in Microsoft word. In that case, Word cannot update cross references - a problem recognized by Microsoft. I attach one of the two documents which require this service. At the moment, they are cross referenced using the standard Microsoft cross referencing tool. This, as stated, will not update when the document is changed.