; 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 During any period beginning on or after the date of the enactment of this Act in which members of the Armed Forces or the National Guard are performing active service (as such term is defined in section 101 of title 10, United States Code) at the southern land border of the United States, 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 relating to current and future construction of the border barrier system 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, and to which the applicable non-Federal parties consent to revive in whole or in part, are honored by the Department in accordance with such agreements and to the extent provided by such consent. (d) Availability of funds (1) In general 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