Custom check (DarkRP Custom check)

[TheTurtlePlay]

Hello, I would like to know how can I make it so you cannot become a job if no one is another job. Example:
I want it so no one can be secret service if there is a mayor

Thanks!

[Billy]

[lua]customCheck = function() if (team.NumPlayers(TEAM_MAYOR) == 0) then return false end end,[/lua]