Paul Williams, Rebecca I. Grazier Professor of Law at American University Washington College of Law and co-founder of the Public International Law & Policy Group (PILPG), and Margaux J. Day, Senior Counsel at PILPG, discuss whether or not Catalonia’s initial step of holding an independence referendum is consistent with international law, particularly under customary international law and relevant judicial decisions. 

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This op-ed was originally published in The Huffington Post on September 28, 2017.