Business executive Ronnie Chan Chichung should consider stepping down from his other overseas directorships following his resignation from the board of failed energy company Enron of the United States, according to financiers. Mr Chan is also a director of US cellular phone manufacturer Motorola and British bank Standard Chartered. 'I would have thought it to be prudent for [Mr Chan] to resign from all of these overseas directorships,' a senior brokerage executive said. The collapse of Enron showed the dangers involved with taking non-executive directorships with overseas companies where it could be difficult to stay informed of developments. 'He is always liable to the problem that he can't be fully aware of what's going on or he may not be paying enough attention,' the broker said. Mr Chan has served on Enron's board since 1996 and chaired its audit committee. He and five other directors will leave in 30 days, according to a filing made on Tuesday by the company with the Securities and Exchange Commission, the US stock market regulator. US unions have also started a campaign to have Enron directors - including Mr Chan - removed from boardroom positions with other listed US companies. Mr Chan has been named as a defendant in legal action taken by investors - who saw the value of their shares plunge to almost nothing in the past six months - alleging insider trading by Enron's directors. The firm will look for replacements to bring the board back up to 14 directors. Analysts do not expect Mr Chan to resign as chairman of Hong Kong-listed property developer Hang Lung Group. 'One would not expect him to resign from directorships in Hong Kong,' the broker said. Earlier this month, Webb-site.com editor David Webb, who campaigns for the rights of minority investors, said Mr Chan should not step down from Hang Lung's board as he was the largest shareholder in the firm. 'If a director who controlled the company steps off its board then they cease to be subject to as much scrutiny under the listing rules and the disclosure rules,' Mr Webb said. 'Directors' dealings, for example, would become less visible and that is not a good thing.'