Roman citizenship
Ius migrationis: The right to preserve one's level of citizenship upon relocation to a polis of comparable status. For example, members of the cives Romani (see below) maintained their full civitas when they migrated to a Roman colony with full rights under the law: a colonia civium Romanorum. Latins also had this right, and maintained their ius Latii if they relocated to a different Latin state or Latin colony (Latina colonia). This right did not preserve one's level of citizenship should one relocate to a colony of lesser legal status; full Roman citizens relocating to a Latina colonia were reduced to the level of the ius Latii, and such a migration and reduction in status had to be a voluntary act.