I am unaware of any way for a union to compel a business to become exclusive without an agreement as described here[1]. Can you provide a citation for this? [1

I am unaware of any way for a union to compel a business to become exclusive without an agreement as described here[1]. Can you provide a citation for this? [1] https://www.nolo.com/legal-encyclopedia/free-books/employee-rights-book/chapter15-5.html https://www.nolo.com/legal-encyclopedia/free-books/employee-...