ptb_switch_immunity <0|1>
0 admins with immunity will be switched.
1 admins with immunity will be protected from switches. (Default)
ptb_limitjoin_immunity <0|1>
0 admins with immunity will not be able to choose any team they want.
1 admins with immunity can choose any team they want. (Default)
ptb_immunity_level "o"
Here you set which flag an admin must have to be immune against transfers (Default o ADMIN_LEVEL_C)