Validity period on ESS iViews

Hi,

We deployed ESS business package on EP7.0. Now when go into the portal and navigate to some personal information detail or review iView, for example, family/dependents, you will see a section where it has validity period radio buttons, such as "Valid from Today" or "Valid From", right above the navigation buttons. If I want to do some customization here, say change the text or remove one or two radio buttons, where should I go to make the modification? I was looking at the webDynpro, in the layout of detail iView, it even doesn't have this section.