; and (2) In subsection (c)(1), by substituting September 30, 2021, for September 30, 2017 . (b) The Secretary of Homeland Security, under the authority of section 831 of the Homeland Security Act of 2002 ( 6 U.S.C. 391(a) ), may carry out prototype projects under section 2371b of title 10, United States Code, and the Secretary shall perform the functions of the Secretary of Defense as prescribed. (c) The Secretary of Homeland Security under section 831 of the Homeland Security Act of 2002 ( 6 U.S.C. 391(d) ) may use the definition of nontraditional government contractor as defined in section 2371b(e) of title 10, United States Code. 528. (a) None of the funds appropriated or otherwise made available to the Department of Homeland Security by this Act may be used to prevent any of the following persons from entering, for the purpose of conducting oversight, any facility operated by or for the Department of Homeland Security used to detain or otherwise house aliens, or to make any temporary modification at any such facility that in any way alters what is observed by a visiting member of Congress or such designated employee, compared to what would be observed in the absence of such modification: (1) A Member of Congress. (2) An employee of the United States House of Representatives or the United States Senate designated by such a Member for the purposes of this section. (b) Nothing in this section may be construed to require a Member of Congress to provide prior notice of the intent to enter a facility described in subsection (a) for the purpose of conducting oversight. (c) With respect to individuals described in subsection (a)(2), the Department of Homeland Security may require that a request be made at least 24 hours in advance of an intent to enter a facility described in subsection (a). 529. (a) Except as provided in subsection (b), none of the funds made available in this Act may be used to place restraints on a woman in the custody of the Department of Homeland Security (including during transport, in a