What must aliens be advised of if they are arrested or detained for administrative removal?

When aliens are arrested or detained for administrative removal, they must be informed of their right to contact a consular official. This right is fundamental as it allows detained individuals to communicate with their home country's government, ensuring they receive necessary support and legal guidance. Contacting a consular official can facilitate access to information regarding their legal situation, rights, and any potential assistance the consulate can provide.

The emphasis on consular notification is rooted in international agreements and principles that aim to protect the rights of foreign nationals when faced with legal issues in a host country. Ensuring that individuals can reach out to their consulate is crucial for safeguarding their rights and ensuring that they have the opportunity to receive appropriate support during the removal process.

In contrast, the other choices do not represent requirements or rights that are specifically mandated in the context of administrative removal. For example, while the right to remain silent applies in criminal proceedings, it is not directly relevant in this administrative context. Similarly, requiring identification or contacting an employer does not inherently relate to the protection of rights or legal provisions for detained aliens.