; (C) not fewer than 41 support staff within the Office of the Principal Legal Advisor to assist immigration judges within the Executive Office for Immigration Review with removal, asylum, and custody determination proceedings; and (D) not fewer than 500 asylum officers to assist in expedited asylum determinations at humanitarian campuses established under section 1601. (2) GAO review and report relating to staffing needs (A) Review The Comptroller General of the United States shall conduct a review of— (i) U.S. Immigration and Customs Enforcement activities and staffing needs related to irregular migration influx events along the southwest border during fiscal years 2014, 2019, and 2021, including— (I) the total number of aliens placed in removal proceedings in connection with such irregular migration influx events; (II) the number of hours dedicated to responding to irregular migration influx events by Enforcement and Removal Operations officers, Enforcement and Removal Operations support personnel, attorneys within the Office of the Principal Legal Advisor, and support staff within the Office of the Principal Legal Advisor; and (III) the impact that response to such irregular migration influx events had on the ability of U.S. Immigration and Customs Enforcement to carry out other aspects of its mission, including the regular transport of migrants from U.S. Customs and Border Protection facilities to U.S. Immigration and Customs Enforcement facilities