; and (C) in each of the Big Bend, Del Rio, and El Centro U.S. Border Patrol Sectors— (i) not fewer than 2 U.S. Border Patrol agents with a commercial driver’s license are available during every shift; and (ii) not fewer than 1 bus is assigned to the sector. (2) Relocation Buses assigned to specific U.S. Border Patrol sectors pursuant to paragraph (1) may be relocated to other sectors in response to changing patterns. (3) Reducing wait times at remote U.S. Border Patrol stations The Commissioner of U.S. Customs and Border Protection shall ensure that sufficient buses are available in each U.S. Border Patrol sector to avoid subjecting detainees to long wait times at remote border patrol stations. (4) Use of official duty time A U.S. Border Patrol agent shall be credited with work time for the process of obtaining and maintaining a commercial driver’s license under paragraph (1). (5) Reports to congress The Secretary shall submit quarterly reports regarding the average length of detainees’ stay at U.S. Border Patrol stations to— (A) the Committee on Homeland Security and Governmental Affairs of the Senate ; and (B) the Committee on Homeland Security of the House of Representatives . 2305. GAO study of waiver of environmental and other laws The Comptroller General of the United States shall study the impact of the authority of the Secretary, under section 102(c) of the Illegal Immigration Reform and Immigrant Responsibility Act of 1996 (division C of Public Law 104–208