MontageCitizenship understands citizenship as a montage of documents, images, permissions, archives and recognitions. ZoningCustody indicates how urban space administers belonging through limits, uses, exclusions and territorial custodianships. ObligationDebt introduces the ethical debt that every form of belonging maintains with bodies, places and previous memories. The triad reads politics through spatial inscription. To belong is not only to possess a right; it is to be composed, situated and obliged. Socioplastics turns citizenship into a material operation where archive, zone and debt intersect. The subject appears as montage under custody.