The constitution of Finland, originally approved in 1919 and rewritten in 2000, has supreme authority and sets the most important procedures for enacting and applying legislation.
Books of Court Procedure (oikeudenkäymiskaari), Trade (kauppakaari) and Construction (rakennuskaari) formally remain in force; many of these acts have been overturned in Sweden.
However, in practice, these have been slowly eroded over the centuries, and many parts are no longer enforced, e.g. references to fines denominated in the ancient currency of Swedish riksdaler.
Important codifications were made during Imperial Russian sovereignty, e.g. the Criminal Code was promulgated by Czar Alexander III in 1889.
Towards the end of the 19th century, the Imperial Russian government began restricting Finnish autonomy, and often refused to give Royal Assent.
In the typical procedure, the Finnish Government proposes a bill to the Parliament of Finland.
All laws are published in the official journal Suomen säädöskokoelma (the Statutes of Finland) when promulgated.