THE Airport Authority said yesterday it was taking action to restrict access by workers who were walking into secure areas at Chek Lap Kok. The Post on Friday revealed about 100 emergency fire doors separating secure and non-secure areas were being opened daily by workers. Switches next to the doors were being smashed by workers scrambling to finish projects on time and wanting to avoid time-consuming security checks and the X-raying of tools and materials. Corporate development director Clinton Leeks said the authority had 'worked out rectification measures with the Fire Services Department while maintaining adequate means of escape for airport users'. Yesterday, 40 Police Tactical Unit officers were to be deployed on the doors and anyone smashing the break-glass switch next to the doors was to be threatened with criminal charges. 'The implementation of aviation security at the airport is proceeding as planned,' Mr Leeks said. Security experts have said the initial sweep of the airside and possibly the enhanced security areas for weapons and guns may have been rendered invalid by the easy access. But Mr Leeks said: 'It has always been our intention to have a final sweep of the restricted areas by police, after the detailed security control system arrangements have been finalised, much closer to the airport opening'. He said the Post's report of a security breach on MTR opening day was incorrect. Mark Siladi, deputy chairman of the Board of Airline Representatives, said airlines still had reservations about security, but added: 'We have assurances from the Government they will be sorted out.'