The indexing (Disclaimer) exclusions are just that. You add the disclaimers you use, and that's it.
The indexing engine will 'see' that whole set of text, and will not index that. You can add as much as you like. In my environment (as example) I have about 6 entries, due to having disclaimers in different languages. You can enter the disclaimer text as text. You can't use any Boleans.