You can check which rules are using a specific classification.
In ePO - SaaS, select Menu → Data Protection → Classification.
In the Classification list, select the classification you want to check usage in rules.
Select Actions → Classification Usage.
The Classification Usage window displays a list of all rules that use the selected classification. You can click a rule to make changes, if needed.
Note
If you delete a classification that is in use with other rules, the Classification Usage window opens automatically.