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In the NGN environment, networks are designed to be multiservice, supporting a wide range of premium services. Each of these services may have different QoS requirements based on the overall end user's perception. New QoS policies are required that adapt the traditional QoS regulatory model to this emerging context. This article presents a user-centric approach to identify key factors contributing to the development of QoS regulation for future networks. A case study shows the application of our user-centric QoS model to Internet QoS regulation in Spain. The results of the study demonstrate the need to adapt current regulatory frameworks to ensure competition, pluralism, and diversity in the new network environment.