Regime
Thailand
-Parliamentary system
-Constitutional monarchy
-Military dictatorship
-Unitary state
-Military junta
Laos
-Republic
-Unitary state
-Communist state
Cambodia
-Unitary state
-Constitutional monarchy
-Elective monarchy
-Parliamentary system
-One-party state
Myanmar
-Parliamentary system
-Presidential system
-Parliamentary republic
-Unitary state
Vietnam
-Communist state
-Unitary state
-One-party state
-Socialist state
Philippines
-Republic
-Presidential system
-Parliamentary republic
-Unitary state
Malaysia
-Democracy
-Constitutional monarchy
-Parliamentary system
-Elective monarchy
Brunei
-Absolute monarchy
-Constitutional monarchy
-Unitary state
Singapore
-Unitary state
-Parliamentary republic
Indonesia
-Democracy
-Presidential system
