In a mini-campaign, for open groups are you limited to only groups included in box sets?

Or can you bring groups from blister packs? For example, I'm starting Bespin and would like to bring 2 regular ISB Infiltrators. Is that allowed?

Thanks!

Each expansion tells how to integrate them and their component limitations.

Non-unique groups can be used in open groups in any campaign.

You can use 1 regular and 1 elite ISB Infiltrator group in the campaign. (Not two regulars if you go by the rules.)

See also:

https://www.boardgamegeek.com/thread/1779440/campaign-multiples

https://www.boardgamegeek.com/thread/1582837/another-question-conccerning-component-limitations

https://www.boardgamegeek.com/thread/1561339/open-groups