To use different rules on one or more card sets:
Sign in to your TalentCards account as an Administrator.
Go to Card Sets (1).
Open a set for editing, either by clicking on the set's title, or by clicking the editing symbol (2).

There are three tabs we are interested in:
Assign
Gamification
Publish & Schedule

Anything you set up there is regarded as another custom rule for this card set.
To view and manage all custom rules from all card sets in a group:
Sign in as an Administrator.
Go to menu icon in the top-left corner.
On the left-side panel, choose Custom Rules (1).

There you can see all the custom rules. Search for a specific set or rule by using the search bar (2).

To move back to the card set, click the relative icon (3).