THE ICAC is issuing an anti-corruption guidebook for contractors, following a sharp rise in the number of bribery complaints in the sector. Ninety-six complaints were received by the Independent Commission Against Corruption in the first nine months of the year, 20 per cent up on last year's total. Some legislators fear the trend will worsen with more infrastructural projects on the way in the next few years. The ICAC's Hong Kong east regional officer, Chui Wong Kit-bing, said the commission had taken note of the trend and priority had been given to fighting corruption in the industry. ''Most management staff in the industry do not work on sites and they usually adopt the 'remote control' management method and this makes monitoring work difficult,'' she said. The large number of middlemen and sub-contractors involved in a single contract also complicated the situation, she said. The ICAC was approaching 430 firms in the industry to promote anti-corruption, she added. Legislative Council lands and works panel member Albert Chan Wai-yip urged the Government to take action as soon as possible, as he feared that more cases would arise with the airport project.