They declare war, make coin money, and set standard weights and measures, the only thing they do not do is conduct reports
I believe d is your answer sorry if I’m wrong.
The prohibition of agreements of Union security between companies and unions through the right to work laws affected the union membership, these laws do not provide a general guarantee of employment to people seeking work, contractual agreements between employers and employees of stable unions, require as a condition of employment that workers must pay the fees or tariffs otherwise it could be up to you to demand your membership if you have not paid the costs of the syndical representation.
