In this document, "protected from" means the player does NOT have access to the area, while "protected by" means the player has (semi-)exclusive access to the area.
This privilege allows to create and modify LUA code in LuaATC rails added by the advtrains_luaautomation mod, as well as to create and manage code environments.
* interlocking:
This privilege allows to build, set up, configure and control all sorts of interlocking equipment.
Players without this privilege are still allowed to set and cancel routes (under the condition that they have train_operator).