Sometimes the law is in accordance with the law, it does not depend on the history of science comes to tak describing the source of the legal provisions in order to better understand the intent in the law.
Sometimes the law, it is not logical to require history to explain the origin of the legal provisions in order to understand the intent of the legislation.
Sometimes act, legislation it doesn't follow the logic relies on history to explain ถึงที่มา of legal provisions to understand the intention of legislation.