; (2) to facilitate the defense against or recovery from a cyber attack, nuclear attack, biological attack, chemical attack, or radiological attack against the United States; (3) in support of a humanitarian or peacekeeping operation (as the term is defined in section 3015(2) of title 10, United States Code); and (4) for purposes of protecting the national security interests of the United States during directed operations that are below the threshold of traditional armed conflict. (b) Special authorities described The special authorities for contracting that may be used by the senior contracting official to rapidly respond to time-sensitive or unplanned emergency situations are as follows: (1) Procedures applicable to purchases below micro-purchase threshold (described in section 1902 of title 41, United States Code), with respect to a single contracting action taken under subsection (a) for a contract to be awarded and performed, or purchase to be made— (A) in the United States, with a value less than $15,000; or (B) outside the United States, with a value less than $25,000. (2) Simplified acquisition procedures (described in section 1901 of title 41, United States Code), with respect to a single contracting action taken under subsection (a) for a contract to be awarded and performed, or purchase to be made— (A) in the United States, with a value less than $750,000; or (B) outside the United States, with a value less than $1,500,000. (3) For simplified procedures for purchases under section 3205 of title 10, United States Code, subsection (a)(2) of such section shall be applied by substituting $10,000,000 for $5,000,000 . (4) The property or service being procured may be treated as a commercial product or a commercial service for the purpose of carrying out the procurement. (c) Determination A written determination required under subsection (a)— (1) may include more than one requested action; (2) may be directed to more than one senior contracting official