HC Deb 23 July 1982 vol 28 c319W
Mr. Arthur Lewis

asked the Prime Minister to what extent a person who has been positively vetted and who is subsequently appointed to a security post has further positive vettings; and at what intervals such fresh vetting takes place.

The Prime Minister

A review of positive vetting clearance normally takes place every five years, except in the case of individuals under the age of 21, whose clearance is reviewed annually.