Pro-democracy rallies could be restricted after the handover when an article of the Basic Law comes into effect, a City University academic said yesterday. At the City Forum, Leung Kwan-kwok, associate professor of applied social studies, said Article 23 stipulated the Hong Kong Special Administrative Region had to enact laws to ban subversive activities. Rallies calling for the end of one-party rule in China might be curtailed as a result. 'There would be problems if the Hong Kong Alliance in Support of Patriotic Democratic Movement in China continued to make such calls after July 1,' he said. 'But it will depend on how the SAR government draws up the legislation.' But the Alliance's chairman, Szeto Wah, was more concerned that pro-democracy movements might be sabotaged by people from the pro-China camp. The target of abusive language from some people at the forum, Mr Szeto said such people might have a higher profile after the handover. 'I am worried that they would sabotage our peaceful demonstrations and stir up trouble,' he said. Mr Szeto had to be escorted by police when he left the forum in Victoria Park. Maria Tam Wai-chu from the Hong Kong Progressive Alliance called on Hong Kong people to put the June 4 crackdown behind them and look to the future. 'We have seen a lot of progress in China in the past few years,' she said.