Make your own role representative visual management boards. As a result, show who holds which roles in your organisation. For example, show who your first aider is. Likewise, who your fire Marshall is.
So add document holders to your role representative visual management boards. These safely house a photo of your relevant representatives. Therefore, your team know who the relevant representative is. In addition, if staffing roles change then photos are quick and easy to update.
Write relevant names using dry wipe pen. Therefore, quick and easy to edit. Likewise, update as you need.
Above all, makes this key information visible to all, at a glance. As a result, visual and effective. In addition, you choose your colours and design. Most importantly, make it clear who your team can turn to for first aid, for example.