A guaranty of sovereignty for Laos that was never kept.
After the end of Vietnam war (1975), SEATO became defunct.
Protocol to the SEATO Treaty, September 8, 1954.
Designation of States and Territory as to Which Provisions of Article IV and Article III are to be Applicable.
The Parties to the Southeast Asia Collective Defense Treaty unanimously designate for the purposes of Article IV of the Treaty the States of Cambodia and Laos and the free territory under the jurisdiction of the State of Vietnam.
The Parties further agree that the above mentioned states and territory shall be eligible in respect of the economic measures contemplated by Article III.
This Protocol shall enter into force simultaneously with the coming into force of the Treaty.
IN WITNESS WHEREOF, the undersigned Plenipotentiaries have signed this Protocol to the Southeast Asia Collective Defense Treaty.
Done at Manila, this eighth day of September, 1954.
SOURCE: U.S. Department of State, American Foreign Policy, 1950-1955, pp. 912-913.