This tab allows the setting of allowed bases for peg surveying and the Active Directory group name of Survey Administrators, as well as settings such as who is allowed to resurvey etc.
The allowed bases are Join, Normal and Reverse.
In this case because its a new installation the Survey Admins Active Directory group has not been set, so anyone can change these settings.
To secure MineModeller you need to enter a valid Active Directory group, after which when the settings are saved, only members of that group will be able to change important settings.