An independent Legco by-election candidate last night hit back at the election watchdog, saying its recent criticism of him was unfair and might provoke 'legal problems'. On Saturday, Thomas Chan Man-hung of the Polytechnic University was almost an hour late for a briefing on the electoral rules by Election Affairs Commission chief, Justice Woo Kwok-hing. Asked if a separate briefing would be held for Professor Chan, Justice Woo said it was like a court hearing and those who showed up late might risk losing the case. Professor Chan, who arrived 20 minutes early for a campaign forum last night, said such criticism was unfair to candidates. 'There might be legal problem as well,' he said, but did not elaborate. All three candidates, Ho Sai-chu of the Liberal Party, Ma Fung-kwok of the New Century Forum and Professor Chan have pledged to make economic recovery and medical reform their priorities if elected. The 800-member Election Committee will vote on September 16 to fill the seat vacated by Ng Ching-fai, now the Baptist University president.