The IEA has discontinued providing data in the Beyond 2020 format (IVT files and through WDS). Data is now available through the .Stat Data Explorer, which also allows users to export data in Excel and CSV formats.
The Law on Oil and Gas provides with the regulatory framework for hydrocarbon production. It notably states two types of special permits related to the development of oil & gas deposits, ranging from five to ten years, and can be extended to 20 years.