; technology The terms tactical infrastructure and technology have the meanings given such terms in section 102(e) of the Illegal Immigration Reform and Immigrant Responsibility Act of 1996, as added by section 3(5) of this Act. (b) In general (1) Immediate resumption of border barrier construction Not later than 1 day after the date of the enactment of this Act, the Secretary shall resume all projects relating to the construction of physical barriers, tactical infrastructure, and technology along the international border between the United States and Mexico that were underway, or being planned for, prior to January 20, 2021. (2) No cancellations The Secretary may not cancel any contract for activities related to the construction of the border barrier system that was entered into on or before January 20, 2021. (3) Use of funds To carry out this section, the Secretary shall expend all funds that were appropriated or explicitly obligated for the construction of the border barrier system on or after October 1, 2016. (c) Uphold negotiated agreements The Secretary shall ensure that all agreements entered into before January 20, 2021, that were executed in writing between the Department and any State, local, or Tribal government, private citizen, or other stakeholder are honored by the Department relating to current and future construction of the border barrier system in accordance with such agreements. (d) Availability of funds Notwithstanding any other provision of law, any amount appropriated or otherwise made available during fiscal year 2018, 2019, 2020, or 2021 for any project relating to the construction of physical barriers, tactical infrastructure, and technology along the southern border shall remain available until expended. (e) Use of funds Any amounts appropriated or otherwise made available for fiscal year 2021 that remain available pursuant to subsection (d) may only be used for barriers, technology, or roads that— (1) use— (A) operationally effective designs deployed as of the date of enactment of the