The proceedings of the National Council and Council of States take place separately.
Decisions of the Federal Assembly require the agreement of both Chambers.
Provision shall be made by the law to ensure that in the event of disagreement between the Councils decisions are made on:
the validity or partial invalidity of a popular initiative;
the implementation of a popular initiative in the form of a general proposal that has been adopted by the People;
the implementation of a Federal Decree initiating a total revision of the Federal Constitution that has been approved by the People;
the budget or any amendment to it.129