along the southern border. (g) U.S. Customs and Border Protection tunnel detection and technology program Not later than September 30, 2023, the Commissioner shall increase by not fewer than 50 the number of officers assisting task forces and activities related to deployment and operation of border tunnel detection technology and apprehensions of individuals using such tunnels for crossing into the United States, drug trafficking, or human smuggling. (h) Agricultural specialists Not later than September 30, 2023, the Secretary shall hire, train, and assign to duty, in addition to the officers and agents authorized under subsections (a) through (g), 631 U.S. Customs and Border Protection agricultural specialists to ports of entry along the southern border and the northern border. (i) Office of Professional Responsibility Not later than September 30, 2023, the Commissioner shall hire, train, and assign sufficient Office of Professional Responsibility special agents to maintain an active duty presence of not fewer than 550 full-time equivalent special agents. (j) U.S. Customs and Border Protection Office of Intelligence Not later than September 30, 2023, the Commissioner shall hire, train, and assign sufficient Office of Intelligence personnel to maintain not fewer than 700 full-time equivalent employees. (k) GAO report If the staffing levels required under this section are not achieved by September 30, 2023, the Comptroller General of the United States shall conduct a review of the reasons why such levels were not achieved. 1132. U.S. Customs and Border Protection retention incentives (a) In general Chapter 97 of title 5, United States Code, is amended by adding at the end the following: 9702. U.S. Customs and Border Protection temporary employment authorities (a) Definitions In this section— (1) the term CBP employee means an employee of U.S. Customs and Border Protection described under any of subsections (a) through (h) of section 1131 of the Border Security for America Act of 2018