Sentence:  Every car in Australia must be registered. Payment for this includes car tax and requires a minimum of third-party insurance. This type of insurance is called the <WSD>Green Slip</WSD>, or compulsory third party (CTP) insurance. 
Meaning of the word marked with <WSD> tags:  A certificate of third party personal liability insurance, required in order to register a motor vehicle.<ref>(archivedate=13 August 2006)</ref>