Definition: Rewrite each original sentence in order to make it easier to understand by non-native speakers of English. You can do so by replacing complex words with simpler synonyms (i.e. paraphrasing), deleting unimportant information (i.e. compression), and/or splitting a long complex sentence into several simpler ones. The final simplified sentences need to be grammatical, fluent, and retain the main ideas of their original counterparts without altering their meanings.
Input: However the registration law changed in 2006 and since March 2007 official vehicles have got standard number plates.

Official vehicles have not gotten standard plate numbers since 2006 because of the change of registration law in 2006.