11A person is legally qualified for the purposes of this Schedule if—
(a)he has a 7 year general qualification, within the meaning of section 71 of the [1990 c. 41.] Courts and Legal Services Act 1990;
(b)he is an advocate or solicitor in Scotland of at least 7 years' standing; or
(c)he is a member of the Bar of Northern Ireland or solicitor of the Supreme Court of Northern Ireland of at least 7 years' standing.