It would be impossible to review the status of more than 3,000 charities each year, a senior Inland Revenue Department official said yesterday, denying it had given different treatment to groups opposing government policies. Acting Deputy Commissioner for Inland Revenue Alice Lau Mak Yee-ming told an RTHK phone-in programme the status of charity groups was reviewed every four years and any greater scrutiny would be impossible. She was speaking after the Hong Kong Women's Christian Council, which has opposed the Government on the right-of-abode issue, was warned by Inland Revenue that its political activities might not be compatible with its charity status. Losing that status would strip it of its tax-exemption privileges. But council chairwoman Helena Wong Pik-wan questioned whether the Kwun Tong Residents Association, which has supported the Government on key issues, had been similarly challenged. 'The group has been involved in political activities for a long time,' she said. Ms Wong said a British report used by the department to claim political activities were not compatible with charities was not relevant as it drew on cases as far back as 1949. 'It is also not for the Government to define religious purposes,' she said.