For international commercial disputes international commercial arbitration and the CISG
together can provide a neutral platform. However it is unclear whether arbitrators are bound
by the CISG. This thesis first examines the legal nature of the CISG's application rules
finding that they constitute private international law which leads to the fundamental matter
of whether arbitrators are bound by PIL. International public and European law and legal
practice are studied to answer this question and in the end a binding nature of PIL in
arbitration is rejected. Finally a cursory look is also taken at the binding effect of
substantive law generally in arbitration.