In chapter 4 when Gatsby drives Nick into the city. how does Gatsby get out from a spending ticket?

In Chapter 4 of "The Great Gatsby," Gatsby gets out of a speeding ticket by showing the police officer a white card that he claims is a special privilege. This card, which he says is a "Christmas gift" from the police commissioner, impresses the officer and leads him to let Gatsby go without a penalty. This moment highlights Gatsby's connections and the idea of privilege that permeates the novel.