The state agencies (Thai: หน่วยงานของรัฐ) that form Thailand's public sector consist of several types of functioning bodies.
While some agencies established by mandate of the constitution are independent, others are directly or indirectly answerable to the executive of the Royal Thai Government.
In addition to the constituents of the three branches of government, the (now-repealed) 2007 constitution provided for certain regulatory and advisory bodies.
They serve the basic functions of government, providing administrative public services, and follow the policies of the executive.
They exist both as purpose-established organizations (e.g., the State Railway of Thailand) and limited companies in which the government is the majority shareholder (e.g., Krung Thai Bank PLC).
They provide social and cultural public services, and operate under supervision of the government, while maintaining a greater degree of administrative independence.