; or (B) any low-level flights over the area that may be necessary for law enforcement and border security purposes; or (2) affects the 2006 Memorandum of Understanding among the Department of Homeland Security, the Department of the Interior, and the Department of Agriculture regarding cooperative national security and counterterrorism efforts on Federal lands along the borders of the United States. (b) Withdrawal and administration of certain area Nothing in this section precludes the Secretary from allowing within the area described in subsection (a)(1)(A) the installation and maintenance of communication or surveillance infrastructure necessary for law enforcement or border security activities. 8. Department of Army responsibility and authority (a) Responsibility Nothing in this Act shall affect— (1) the responsibility of the Department of the Army under applicable environmental laws, including the remediation of hazardous substances or munitions and explosives of concern within the National Monument boundaries; (2) the statutory authority of the Department of the Army to control public access or statutory responsibility to make other measures for environmental remediation, monitoring, security, safety, or emergency preparedness purposes; (3) the activities of the Department of the Army on lands not included within the National Monument; or (4) the responsibility of the Department of the Army, in consultation with the Secretary (acting through the Bureau of Land Management), to continue to manage the lands and interests in lands under the Secretary’s jurisdiction within the National Monument boundaries until the Army transfers administrative jurisdiction of those lands and interests in lands to the Bureau of Land Management. (b) Authority The Secretary of the Army and the Secretary may enter into a memorandum of understanding whereby the Secretary of the Army— (1) may relinquish administrative jurisdiction over the Castner Range, Fort Bliss, Texas, to the Secretary of the Interior