The way this works best is that you have a federal system that sets out what the member states can't do (e.g. block internet, censor speech, ex post facto laws, trade barriers) and then the central government exists only to enforce those constraints on the member states, who choose whether and how to do any of the things they are allowed to do.
The way this works best is that you have a federal system that sets out what the member states can't do (e.g. block internet, censor speech, ex post facto laws, trade barriers) and then the central government exists only to enforce those constraints on the member states, who choose whether and how to do any of the things they are allowed to do.