Section 1003 of U.S. Public Law 100-204 listed below:
Section 1003. PROHIBITIONS REGARDING THE PLO.
It shall be unlawful if the purpose be to further the interests of the
Palestine Liberation Organization or any of its constitutent groups, any
successor to any of those, or any agents thereof, on or after the
effective date of this title--
(1) to receive anything of value expect information material from the
PLO or any of its constituent groups, any successor thereto, or any
agents thereof;
(2) to expend funds from the PLO or any of its constitutent groups, any
successor thereto, or any agents thereof; or
(3) notwithstanding any provision of law to the contratry, to establish
or maintain an office, headquarters, premisis, or other facilities or
establishments within the jurisdiction of the United States at the
behest or direction of, or with funds provided by the Palestine
Liberation Organization or any of its constitutent groups, any successor
to any of those, or any agents thereof.
http://lists.mcgill.ca/scripts/wa.exe?A2=ind9812b&L=paldev&P=164