Vehicle Custom Field Settings
Define the custom fields your fleet uses — their name, data type, and whether a value is required — once, for your whole account. This is account-level configuration, done here rather than per vehicle: create a definition once (e.g. "Cost Centre", type text) and every vehicle in your fleet can then be given a value for it via /vehicles/{registration}/custom-fields. Nothing your drivers or dispatchers see changes until you configure something here first.