Following Japan’s 1941 attacks on Hawai’i and Hong Kong, Canada relocated, detained, and exiled citizens and residents of Japanese ancestry. Many interracial families, however, were exempted from this racial project called the internment. The form of the exemption was an administrative permit granted to its holder on the basis of their marital or patrilineal proximity to whiteness. This article analyzes these permits relying on archival research and applying a critical race feminist lens to explore how law was constitutive of race at this moment in Canadian history. I argue that the permits recategorized interracial intimacies towards two racial ends: to differentiate the citizen from the “enemy alien”; and to regulate the interracial family according to patriarchal common law principles. This article nuances received narratives of law as an instrument of racial exclusion by documenting the way in which a new inclusive state measure sustained old exclusions.