Say there's a vote on decriminalizing marihuana (from what I understood this happened in some states). Are you then allowed to walk around with a weed leaf t-sh

Say there's a vote on decriminalizing marihuana (from what I understood this happened in some states). Are you then allowed to walk around with a weed leaf t-shirt? What if its a band logo called The Amazing Cannabis with a bunch of happy leaves smoking a joint? What if its a flag in colours red/green/yellow with a black weed logo on it?