This is a book produced by the Public Prosecution Department, Ministry of Interior of Thailand, in accordance with a "secret order" from Field Marshal <a href="https://en.wikipedia.org/wiki/Plaek_Phibunsongkhram" class="extiw" title="w:Plaek Phibunsongkhram">Plaek Phibunsongkhram</a>, Prime Minister of Thailand. The book is divided into two parts: Part 1 contains explanations about the French administration and laws in French Indochina; Part 2 is a compilation of those laws. Regarding the laws contained in Part 2, the preface says that they are Thai translations of the original documents which were in the "Thai Noi language" (perhaps referring to the <a href="https://en.wikipedia.org/wiki/Lao_language" class="extiw" title="w:Lao language">Lao language</a> written with the <a href="https://en.wikipedia.org/wiki/Tai_Noi_script" class="extiw" title="w:Tai Noi script">Thai Noi script</a>), and, in order to maintain the originality of the documents, the translations were done without changing the original wording and without making any correction or addition, despite clear errors in the original documents.
<bdi><a href="https://www.wikidata.org/wiki/Q13022698" class="extiw" title="d:Q13022698"><span title="public prosecution agency of Thailand">Office of the Attorney-General (Thailand)</span></a>
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อัยยการ, กรม. (๒๔๘๔). <i>การปกครองและกฎหมายที่ใช้ในอินโดจีนฝรั่งเศส</i>. พระนคร: โรงพิมพ์ไทยเขษม.