One pillar for the AMS States?
This shows that here, too, the EEA model is mentioned as a blueprint. At the same time, it soon became clear that the three AMS States might see a two-pillar system as rather burdensome from an administrative point of view. It seems therefore possible that the negotiations will lead to a one-pillar system instead, where the EU institutions are in charge also of association matters relating to the AMS states.In the event of full integration, in order to ensure the homogeneity of the internal market and legal certainty for economic operators and citizens, any agreement with the small-sized countries would need to address four horizontal issues related to: (i) the dynamic adaptation of the agreement to the evolving acquis; (ii) the homogeneous interpretation of the agreements; (iii) independent surveillance and judicial enforcement; (iv) and dispute settlement. In this respect, the EU could draw on the successful experience of the EEA Agreement in this respect. However, any agreement should take into account the specificities and particular identities of the small-sized countries, in line with the Declaration on Article 8 TEU. To safeguard these principles, it may be necessary to offer the small-sized countries transitional periods and/or safeguard clauses.

Further reading:
If you are interested in further reading about the AMS association, also from a comparative perspective, we recommend the following article:Nicola Forster/Felix Mallin, ‘The Association of European Microstates with the EU. Integration Test with Model Value’, SWP Comments 27, June 2014.References
[1] Agreement on Cooperation and Customs Union between the European Economic Community and the Republic of San Marino, OJ 2002 L 84/43.[2] Agreement between the European Economic Community and the Republic of San Marino providing for measures equivalent to those laid down in Directive 2003/48/EC on taxation of savings of income in the form of interest payment, OJ 2004 L 381/33.[3] Amending Protocol to the Agreement between the European Community and the Republic of San Marino providing for measures equivalent to those laid down in Council Directive 2003/48/EC on taxation of savings income in the form of interest payments, OJ 2015 L 346/3[4] Monetary Agreement between the Italian Republic, on behalf of the European Community, and the Republic of San Marino, OJ 2012 C 121/2.[5] Council conclusions on EU relations with EFTA countries, 3060th General Affairs Council meeting, Brussels, 14 December 2010.[6] Communication from the Commission to the European Parliament, the Council, the European Economic and Social Committee and the Committee of the Regions: Relations with the Principality of Andorra, the Principality of Monaco and the Republic of San Marino Options for Closer Integration with the EU, COM(2012) 680 final.Switzerland in Europe: Money, Migration and Other Difficult Matters

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