Abstract: The rule of law principle is widely recognized as a public good, meanwhile its implementation faces substantial barriers. Authors explore such barriers with regard to the Eurasian Economic Union and among them outline the problem of Eurasian Economic Commission’s competence and effect of its legal instruments, the issues relating to legitimacy of EAEU system of bodies lacking people representation institutions, and lack of machinery of members states’ laws and regulation harmonization. Engaging comparative method and a method of systematic analysis, the authors suggest using the experience of the EU, particularly in providing better accountability of its institutions to national parliaments, and introducing legal instruments which will ensure harmonization of laws, as well as enhance transparency in the process of rule-making and law enforcement of the Union’s acts. Demonstrating the examples from financial and environment protection spheres, the authors conclude that public policy practice in every member state may be reconciled with best standards in the Union as well as with the best global standards by means of international agreements and decisions of Union’s bodies. It will substantially improve the quality of public governance in the member-states.