A certificate that sets out a general description of vehicles rather than identifying the vehicles covered by their registration numbers. Particularly useful for fleet insurances, it obviates the need for fresh certificates when a fleet owner buys or sells vehicles.

A motor policy describing the vehicles in general terms rather than specifying them individually. The policy usually refers to any motor vehicle, details of which have been notified to the insurer. When a change of vehicles takes place the substitution does not have to be endorsed on the policy. The Motor Insurance Database does not preclude blanket policies or certificates, but for tracing purposes, under the European Directive, the policyholder must maintain a record of vehicles.

A liability insurance restrictive endorsement excluding work on blast furnaces. The clause is equally a gasometer clause, or a towers clause, given the other buildings (hangars, steeples, bridges, viaducts and roofs other than private dwellings and/or shops of not more than three floors) also named. They all call for close scrutiny from the underwriter because of their height or other physical characteristics.