Definition - What does Codification mean?
Codification is when a group of laws is collected and arranged into a code. This code then serves as the basis for law enforcement and government agencies to use to enforce laws.
An example of a code derived from a group of laws would be the criminal code. The building code would be another one.
Justipedia explains Codification
Arranging laws into a code makes the process of enforcing the laws in the code simpler. It keeps it all organized and easy to reference. Codes are also helpful for ordinary members of the public who need information about specific regulations or laws within a code.
Codes can be altered over time as laws change. For example, the building code can easily change over time as new rules are created for new building technologies.