Academics who draft questions for the Examinations Authority may be barred from teaching related subjects at Form Five and Form Seven levels until at least one year after their service ends. They and their immediate family members should not have any connections with tutorial schools and publishers, under new rules proposed yesterday by the authority. The measures are to avoid a repeat of the incident involving an academic who worked for the authority and a tutorial school at the same time. About 600 students presented answers based on a model essay written by Dr Ho Tim, who sat on the authority's subject committee, in this year's A-Level examinations. The students were not given marks. Joseph Chow Ming-kuen, authority chairman, said: 'We aim to enhance the credibility of the examination system and protect committee members against unfounded criticism.' The authority will consult the School Examinations Board before making a decision in December.