This document discusses the legal and spatial aspects of the US-Canada border. It aims to highlight the complexity of creating legal spaces and will examine Canadian and provincial case law related to border issues. It will use the concepts of "brackets" and "frames" to analyze how legal language shapes understandings of the border. Specifically, it will look at how Supreme Court decisions define and reinforce the legal concept of borders. Key issues that will be examined include security certificates, search and seizure policies, and First Nations treaty rights. The overall goal is to bring attention to how legal rulings help establish and maintain the political nature of border regions.