15 U.S. Code § 8304 - Authority to prohibit participation in
swap activities  Except as provided in section 6 of title 7, if
the Commodity Futures Trading Commission or the Securities and
Exchange Commission determines that the regulation of swaps or
security-based swaps markets in a foreign country undermines the
stability of the United States financial system, either
Commission, in consultation with the Secretary of the Treasury,
may prohibit an entity domiciled in the foreign country from
participating in the United States in any swap or security-based
swap activities.   (Pub. L. 111–203, title VII, § 715,July 21,
2010, 124 Stat. 1647.)