Federal legislation

In Switzerland, the legal requirements for trials with electronic voting are specified in Article 8a of the Federal Act on Political Rights and in Articles 27a-q of the Ordinance on Political Rights as well as in the Federal Chancellery Ordinance on Electronic Voting and its annex. 

 
https://www.bk.admin.ch/content/bk/en/home/politische-rechte/e-voting/versuchsbedingungen.html