What authority allows for the search of any conveyance based on a belief that aliens are being brought in?

The authority that permits the search of any conveyance based on a belief that aliens are being brought in is found in INA § 235(d)(1). This provision specifically enables immigration officers to examine and search conveyances arriving in the United States if there is reasonable suspicion or belief that they are carrying individuals who have unlawfully entered or are attempting to enter the country.

This section of the Immigration and Nationality Act empowers officials to take action to prevent illegal immigration by allowing them to inspect vehicles, vessels, and other conveyances that may be involved in transporting aliens. The emphasis here is on the proactive measure of addressing potential violations of immigration law as they relate to the transportation of unauthorized individuals.

Understanding the context of this authority is crucial as it plays a significant role in the enforcement of immigration laws and the government's efforts to regulate and control the entry of individuals into the United States.