On April 18, 2017 Switzerland ratified the Mauritius Convention on transparency in ISDS. This means that the convention will enter into force six months later, October 18, 2017.
The Mauritius Convention is an instrument intended to extend the applicability of the UNCITRAL Transparency Rules. The Rules address many perceived problems with transparency in ISDS and essentially make the disputes more transparent than national courts. However, the Rules only apply to treaties entered into from April 1, 2014. By ratifying the Convention, states extend the applicability of the Rules to older treaties.
Sweden has signed the convention but not yet ratified it.