The fundamental laws that form the backbone of Thai law have been codified into four codes: the Civil and Commercial Code, the Penal Code, the Civil Procedure Code and the Criminal Procedure Code.
The Civil and Commercial Code includes provisions relating to general principles, obligations, contract law, property law, family law and the law of succession. The provisions relating to general principles are particularly significant because they are often applied to laws outside the Civil and Commercial Code.
The Land Code (1954) was the first major legislation systemizing land laws in Thailand.