progamatically carry forward content link between drawing and WTPart

Hi all,

In my case, I have a content link between CAD Drawing and WTPart. When CAD Drawing is revised , content link will be lost with the WTPart. I know that there is a preference in Org level to carry forward the content but it applies to all libraries. My client wants this logic only for few libraries and hence I may need code to achieve this functionality after revising CAD Drawing. Please suggest.

Regards.