This study intends to analyse the interaction between constitutional courts and commercial arbitration courts in the European context, with particular reference to the current situation and regulations in Romania. The analysis has as main coordinates the applicable regulatory developments and the constitutional review carried out upon notification by commercial arbitration courts, highlighting the jurisprudential benchmarks. The commercial arbitration courts have the possibility to notify the Constitutional Court for settlement of exceptions of unconstitutionality of laws and ordinances in cases brought before them. This was introduced during the 2003 revision of the Constitution of Romania. Thus, before that time we could only talk about how commercial arbitration courts were enshrined in the case-law of the Romanian Constitutional Court. After 2003, the analysis concerned the notifications addressed to the Constitutional Court by commercial arbitration courts, including international courts, as well as the procedural and substantive questions raised in those notifications. We refer specifically to the notification of the Constitutional Court by the International Court of Arbitration of the International Chamber of Commerce in Paris, France and the resolutions thereof. The study is intended also as an invitation to reflect and debate on the solutions identified, and on the effects they produce.