Fleet Policy
The written rules governing who gets a vehicle, how it is used, who maintains it and how it is replaced. The document that decides how much authority the fleet manager actually has.
A fleet policy is the adopted instrument setting out assignment, permitted use, maintenance obligations, replacement criteria and accountability. In most jurisdictions it lives as an administrative regulation or a council-adopted policy rather than as a fleet document.
Its practical importance is that it converts persuasion into authority. Whether a department must release a vehicle for scheduled maintenance, whether the fleet may decline to repair a unit past its replacement point, whether take-home assignment requires justification: each of those is either written down or it is a negotiation the fleet manager has again every time. The single most common structural problem in a public fleet is a manager held accountable for cost and availability without the authority to compel either.
The recurring gap is that policies specify the obligations of the fleet in detail and the obligations of the using departments barely at all. The clauses that actually matter are the ones binding the departments: release for service, reporting damage, notifying on assignment changes, meeting utilization thresholds.
A policy nobody revisits also decays. Vehicle classes change, work changes, and a rule written for a fleet of sedans applies awkwardly to one with electric vehicles and take-home patrol units.