Making specific collaborator types required on a recruiting redwood requisition

Summary:

We want to make certain collaborator types required on a recruiting requisition (in Redwood).

Content (please ensure you mask any confidential information):

We attempted to make 2 specific collaborator types required on a requisition via business rules in VBS - but have been unsuccessful.

Has anyone had a similar requirement and had any success doing this in VBS?

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

26C

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