Which document is referenced for the authority to detain non-citizens for national security concerns?

The authority to detain non-citizens for national security concerns is rooted in the provisions of 8 USC 1226(a). This section of the United States Code allows for the detention of non-citizens pending their removal proceedings or when they are considered a threat to national security or public safety.

Under this statute, the Attorney General has the discretion to decide whether to detain an individual who is subject to removal proceedings. This includes individuals who may pose a risk to national security due to various factors, such as their affiliations or actions. The provision is designed to ensure that the government can take appropriate measures to protect national security while balancing the rights of individuals during immigration processes.

In comparison, while the other options refer to different aspects of immigration law and enforcement, they do not specifically address the authority to detain individuals with respect to national security concerns. Thus, 8 USC 1226(a) is the most relevant and appropriate choice for this specific context.