Prior to the Illegal Immigration Reform and Immigrant Responsibility Act of 1996, exclusion was the formal term for denial of an alien’s entry into the United States. The decision to exclude an alien was made by an immigration judge after an exclusion hearing. Since April 1, 1997, the process of adjudicating inadmissibility may take place in either an expedited removal process or in removal proceedings before an immigration judge.
Source: U.S. Citizenship and Immigration Services