Is Soft Law Making Hard Law Too Hard?

Soft laws are created for many reasons to serve various purposes. This article focuses on acts of soft law that are adopted to facilitate the process of applying hard law (or complying with it) and to standardize the understanding of international agreements. In the field of customs law, one can point, for instance, to opinions adopted by the World Customs Organisation. The Organisation for Economic Co-operation and Development (the OECD) Transfer Pricing Guidelines for Multinational Enterprises and Tax Administrations and the Commentary to the OECD Model Tax Convention on Income and on Capital are globally recognized examples of the tax arena. The side effects of the application of acts of soft law in the fields of tax law and customs law are presented and analysed. Interpretative problems are observed at the international level, whereas clear-cut side effects often occur domestically. customs classification – World Customs Organisation (WCO) – double taxation conventions – Organisation for Economic Co-operation and Development (the OECD) – Model OECD – OECD Transfer Pricing Guidelines – OECD Commentary – interpretation