disable patrol on foot?

hi my server is running 3 people patrolling the city on foot group my players are complaining like to know if there is the possibility to only disable this type of patrol or is to decrease the group number for one person?
Where do you change that?
 
This will take some dirty hands on coding you will have to go into the actual infantry config file where it creates the groups and edit the size of the group in the type you should be able to disable the Infantry completely I'm sure that's a separate config file to create the helicopter and the land Patrols
 
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