Lebanon and Syria Liberation Act - States that U.S. sanctions, controls, and regulations relating to Syria shall remain in effect until the President certifies that: (1) Syria has ceased support for terrorism, has dismantled biological, chemical, or nuclear weapons programs and has committed to combat their proliferation, has withdrawn from Lebanon and respects the boundaries and sovereignty of all neighboring countries, and upholds human rights and civil liberties; and (2) sovereignty has been restored to Lebanon.
Imposes specified trade, assistance, and military sanctions, as appropriate, on persons or countries that transfer goods or technology so as to contribute to Syria's biological, chemical, nuclear, or advanced conventional weapons programs.
Sets forth diplomatic measures intended to achieve such nonproliferation.
Directs the President to provide assistance to support a democratic transition in Syria and the restoration of sovereign, democratic rule in Lebanon. Authorizes appropriations.