Custom Command Levels

I did a lot of searching before posting. I know that in the database under “world” there is a “command” section which has “permissions” but they are all numbered differently. Can someone explain how this works, I want to tweak a few commands to be accessible to level 1, without giving the GM level 2 or level 3.

https://trinitycore.atlassian.net/wiki/spaces/tc/pages/2130095/RBAC+Role+based+Access+Control