Article 8
Within a period of six months starting with the date on which a person enters the United Kingdom for the first time as a member of the Office, he may either—
(a)
import one motor vehicle for his personal use, in which case he shall be exempt from any duties and taxes which would be payable on the importation, or
(b)
purchase within the United Kingdom one motor vehicle for his personal use, in which case he shall be exempt from any tax which would be payable on the purchase.