AdminLevel don't depend on which command they can use or not.
Now, Status does.
There are: 16,32,48,64,80. 16 Is the one that can do all of working commands. 32 and higher, they have restricted things.
status 80 - Cannot do anything just hide (invis)
status 64 - Can do notices and hide
status 48 - Now can kick a player from game
status 32 - Now Full GM make items/mobs etc...
status 16 - Now Admin and can do anything.
Prof's Guide PDF file has a full explanation and can be downloaded here:
Btw, you can make some Custom GM Commands by either ChatLog triggers or SP(PS_GameLog.dbo.usp_Insert_Action_Log_E: ). Like Ban,Ress adding AP and such commands. Since /ban doesn't work without this.
For SP :
For ChatLog triggers :
Good Luck