Action validator for standard windchill actions

Hi.

I need to hide "relatedPartsDocuments" and "relatedPartsCADDocuments" tables from info page of wtpart softtype (an only for this softtype).

How should i define UIComponentValidator not to brake standard behavior of these tables?

I know how i can get action name and softtype id in UIComponentValidator. The question is how not to affect standard display settings for other softtypes?

Thanks.