https://usalaborlawsigns.com/product/california-state-and-federal-labor-law-digital-poster/California Labor Law posters with at least one employee must post particular notifications advising employees of their rights in the workplace. The notice that must be posted, the employers who must post the notice, and how to obtain the notice are all stated here. All posting requirements must be posted in a conspicuous position that is visible to all employees.