; tier 5 The terms Tier 4 and Tier 5 with respect to background investigations have the meaning given such terms under the 2012 Federal Investigative Standards. (4) Veteran The term veteran has the meaning given such term in section 101(2) of title 38, United States Code. . (d) Polygraph examiners Not later than September 30, 2021, the Secretary of Homeland Security shall increase to not fewer than 150 the number of trained full-time equivalent polygraph examiners for administering polygraph examinations under the Anti-Border Corruption Act of 2010, as amended by this section. 134. Additional U.S. Immigration and Customs Enforcement personnel (a) Enforcement and removal officers Not later than September 30, 2021, the Director of U.S. Immigration and Customs Enforcement shall increase the number of trained, full-time, active duty U.S. Immigration and Customs Enforcement Enforcement and Removal Operations law enforcement officers performing interior immigration enforcement functions to not fewer than 8,500. (b) Homeland Security Investigations special agents Not later than September 30, 2021, the Director of U.S. Immigration and Customs Enforcement shall increase the number of trained, full-time, active duty Homeland Security Investigations special agents by not fewer than 1,500. (c) Border Enforcement Security Task Force Not later than September 30, 2021, the Director of U.S. Immigration and Customs Enforcement shall assign not fewer than 100 Homeland Security Investigations special agents to the Border Enforcement Security Task Force Program established under section 432 of the Homeland Security Act of 2002 ( 6 U.S.C. 240 ). 135. Other immigration and law enforcement personnel (a) Department of Justice (1) United states attorneys Not later than September 30, 2021, in addition to positions authorized before the date of the enactment of this Act and any existing attorney vacancies within the Department of Justice on such date of enactment, the Attorney General shall— (A) increase by not fewer than 100 the number of