The sorting of individuals is one critical function performed by migration law. These legal regulations are based on dichotomies, such as separating irregular migrants from regular migrants. However, through the multi-scalar management of human mobility, the conflicting coexistence of national and supranational interests decentres these legal binaries. Therefore, migration law devices sort newcomers in a more complex way, giving shape to multilayered and unstable hierarchies of otherness. Using Spain as a case study on migration control changes, this paper addresses the role that migration law enforcement institutions play in cementing and eroding these legal categories. First, it analyses the consequences of the so-called ‘migration crisis’ in enlarging a European asylum system that, until recently, seemingly rests on few countries. Second, it examines the increasing normalisation of the forced return of European Union (EU) (and European Free Trade Association [EFTA]) nationals, which undermine a critical prerogative of the EU citizenship status.

中文翻译：

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不断变化的多尺度欧盟边界景观：庇护的扩大和欧盟和欧洲自由贸易联盟公民驱逐出境的正常化

对个体进行分类是移民法执行的一项关键功能。这些法律规定基于二分法，例如将非正常移民与正常移民分开。然而，通过对人类流动的多尺度管理，国家利益和超国家利益的冲突共存使这些法律二元体系去中心化。因此，移民法装置以更复杂的方式对新来者进行分类，形成多层次且不稳定的他者等级。本文以西班牙作为移民控制变化的案例研究，阐述了移民执法机构在巩固和削弱这些法律类别方面所发挥的作用。首先，它分析了所谓的“移民危机”在扩大欧洲庇护体系方面的后果，该体系直到最近似乎还依赖于少数几个国家。第二，