Hey there! Here you are the list of rules related to gangs/turfs and such. If you are willing to apply to make your own gang you should read this. And this is how you apply to hold a gang slot here. Plus the known general rules of LawlessRP
If you need anything else please don't hesitate to make another question or send me a private message.
If you mean "How to RP with the Chief", Feel free to talk with him to host a RP scene or talk to the faction management to host a gang / faction event like Raz did last time. If you meaned "How to be Chief", build expierence up in the LSPD and show lot's of effort ((Takes a year most likely or more)).