A driver's license is a legal authorization, or the official document confirming such an authorization, for a specific individual to operate one or more types of motorized vehicles—such as motorcycles, cars, trucks, or buses—on a public road. Such licenses are often plastic and the size of a credit card. In most international agreements the wording "driving permit" is used, for instance in the Vienna Convention on Road Traffic. In this article's country specific sections, the local spelling variant is used. Most American jurisdictions issue a permit with "driver license" printed on it but some use "driver's license", which is conversational American English. Canadian English uses both "driver's licence" as well as "driver licence". The Australian and New Zealand English equivalent is "driver licence". In British English and in many former British colonies it is "driving licence". The laws relating to the licensing of drivers vary between jurisdictions.