Vienna Rules (Arbitration) [VIAC] The most recent version of the Rules of Arbitration and Conciliation of VIAC (Vienna Rules) was adopted by the Extended Presiding Committee of the Austrian Federal Economic Chamber on 8 May 2013. The new Vienna Rules 2013 took effect on 1 July 2013 and apply to all proceedings initiated on or after that date. in Legislationwith arbitrationaustriarulesviac