Restrict line manager from adding a contingent worker through duplicate check

Summary:
Hello. In the responsive UI, we have our configuration set up to prevent leaders from adding a contingent worker through the duplicate check. If the line manager tries to an error message displays. Can this same configuration be achieved through VBCS? If so, how?

Content (please ensure you mask any confidential information):

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

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