48 CFR 25.703-3 - Comprehensive Iran Sanctions, Accountability, and Divestment Act of 2010, section 106.
(a) The head of an executive agency may not enter into or extend a contract for the procurement of goods or services with a person that exports certain sensitive technology to Iran, as determined by the President and listed in the System for Award Management Exclusions via http://www.acquisition.gov (22 U.S.C. 8515).
(b) Each offeror must represent that it does not export any sensitive technology to the government of Iran or any entities or individuals owned or controlled by, or acting on behalf or at the direction of, the government of Iran.
(c) Exception for trade agreements. The representation requirement of paragraph (b) of this subsection does not apply if the acquisition is subject to trade agreements and the offeror certifies that all the offered products are designated country end products or designated country construction material (see subpart 25.4).