What is the name of the civil search warrant that allows agents to search for unauthorized aliens without employer consent?

The correct answer to the question is the administrative search warrant. This type of warrant is specifically designed to allow agents to conduct searches for purposes related to enforcing immigration laws and can be used to search for unauthorized aliens without needing the consent of the employer. It is distinct from other types of search warrants because it does not require the same level of probable cause that is typically needed for a standard search warrant.

Administrative search warrants are typically issued when there is a reasonable belief that violations have occurred, such as the employment of undocumented workers. This enables agents to carry out their duties in a manner that is aligned with enforcing immigration regulations and ensuring compliance with the law.