Abstract: The invention provides a method that enables more efficient use of a code locking system, by hierarchy of codes. In order to implement this method existing code locking systems can be used by adjusting their software. It is recommended that the system will include a screen. All operations can be done in the code locking system itself without the need for external systems. So that all operations can be done in the same way that users with the system in the normal use. But you can also use external systems. The method is to allow anyone who has an access code to the protected place to create underneath levels and codes according to the needs, regardless of how many levels above him or of who has created his code. From any code (at any level) can be created separate and different chain of levels and codes, and should be no parallel between the amount of levels and codes that result from the various codes, even if they are at the same level and result from the same code.