About: http://webisa.webdatacommons.org/251780345

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	They could be done with a sticker kept on the windshield, which is in fact how emissions is dealt with in most states and how taxation is done in the UK and other jurisdictions.
http://www.w3.org/ns/prov#wasQuotedFrom	airliners.net