A more thorough explanation:

The science of legislation, also known as law reform, is the process of improving or modernizing a body of law. This can be done for a specific branch of law or for the law as a whole. It involves investigating and discussing the law on a particular topic, usually by a commission or expert committee, with the goal of proposing changes to improve how the law operates.

• A commission is formed to investigate the bankruptcy laws in a country. They study the current laws, identify any issues or inefficiencies, and propose changes to make the laws more effective.
• A group of legal experts come together to discuss the criminal justice system. They analyze the laws and procedures in place, and suggest reforms to make the system more fair and efficient.

These examples illustrate how the science of legislation works. By examining the current laws and identifying areas for improvement, experts can propose changes that will make the legal system more effective and just.