Restricting Resumes to be in PDF format

Summary:

Is there a way to restrict resumes to be uploaded only in PDF format in Recruiting platform?

Content (required):

When candidate is applying for a job or when a referral is made against a requisition or when a candidate profile is added manually by a recruitment admin, resumes in ORC can typically be of any format. Is there a way we can restrict the resumes to be in PDF format only?

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