My name is Por Chandara, government officer, responsible for law and policy making. May I seek for your kind support. I want to propose a LAW ON ECONOMIC SYSTEM OF THE KINGDOM OF CAMBODIA but I have no idea where and what I should start with. May you provide me some input and samples for drafting the law.
You have asked a very interesting question. Without more specific information, it would take volumes to answer this general question appropriately; however, I can point you to a few resources that may be useful.
The Congressional Research Service writes frequent documents to educate Congress (our lawmaking body) on issues to inform the lawmaking process. I have searched such reports for those related to economics. This result set may be useful to you. https://www.everycrsreport.com/topics/economic-policy.html
The Joint Committee on Taxation website may also be useful. This group must review all legislation that impacts revenue generated through taxation. https://www.jct.gov/ You can find key laws that have been passed referenced and detailed, along with their projected economic impact.
The OMB reviews the economic impact of regulations: https://www.whitehouse.gov/omb/