Rules? Collective agreements are entirely voluntary, by law.
What is happening is that the union is using connected companies to force Tesla to sign a collective agreement.
Employees are not prohibited from joining the union themselves, they are protected by law and Tesla can not stop them nor fire them for it.
From what I've read, the employees are quite happy as it is, and a collective agreement would actually make thing worse as it puts some restrictions on the relation between employer/employee.
Also not that Sweden is not US, there are a bunch of laws that protects workers, no matter if they are in a union or not.
What is happening is that the union is using connected companies to force Tesla to sign a collective agreement.
Employees are not prohibited from joining the union themselves, they are protected by law and Tesla can not stop them nor fire them for it.
From what I've read, the employees are quite happy as it is, and a collective agreement would actually make thing worse as it puts some restrictions on the relation between employer/employee.
Also not that Sweden is not US, there are a bunch of laws that protects workers, no matter if they are in a union or not.