15.—(1) The Secretary of State must issue a certificate (a “completion certificate”) if, after service of a stop notice, the Secretary of State is satisfied that the person has taken the steps specified in the notice.
(2) A stop notice ceases to have effect on the issue of a completion certificate.
(3) A person on whom a stop notice is served may at any time apply for a completion certificate.
(4) The Secretary of State must decide whether to issue a completion certificate within 14 days of the application.
(5) A person on whom the stop notice was served may appeal against a decision not to issue a completion certificate on the grounds that—
(a)the decision was based on an error of fact;
(b)the decision was wrong in law;
(c)the decision was unfair or unreasonable;
(d)the decision was wrong for any other reason.