; and (2) consider volume from seasonal surges, other projected changes in commercial and passenger volumes, the most current commercial forecasts, and other relevant information. (f) Amendment Subparagraph (A) of section 411(g)(5) of the Homeland Security Act of 2002 ( 6 U.S.C. 211(g)(5) ) is amended— (1) by striking model and inserting models ; (2) by inserting agricultural specialists, before and support personnel ; and (3) by inserting before the period at the end the following: , and information concerning the progress made toward meeting officer, agriculture specialist, and support staff hiring targets, while accounting for attrition . (g) GAO report If by September 30, 2020, the Commissioner of U.S. Customs and Border Protection has not hired at least 500 additional officers authorized under subsection (a) or at least 50 additional agriculture specialists authorized under subsection (b), and in any subsequent fiscal year in which the staffing levels specified in the Workload Staffing Model or Agriculture Resource Allocation Model for the Office of Field Operations have not been achieved, the Comptroller General of the United States shall— (1) conduct a review of U.S. Customs and Border Protection hiring policies and processes to identify factors contributing to such levels not being achieved and any other issues related to hiring by U.S. Customs and Border Protection; (2) consider attrition levels within the Office of Field Operations to identify associated factors contributing to attrition within the workforce of such Office