Validate Document of Record Fields for specific Actions

Summary:

We are trying to validate fields in specific document only for certain actions, lets say During "Add Pending Worker", Document - To Date should be validated. I am trying to fetch the action using below, but it is always returning blank, how to fetch the action for validating Document of Record?

Content (please ensure you mask any confidential information):

Customer - MDC General Services Holding Company LLC
Use Case - 20

Version (include the version you are using, if applicable):

24B

Code Snippet (add any code snippets that support your topic, if applicable):