PEOPLE'S Liberation Army (PLA) troops in Hong Kong should conduct themselves in the same way as their British counterparts with the same rights, according to a local co-convenor of the working panel for the future government. Rita Fan Hsu Lai-tai, of the law and order sub-group, said this was the principle followed in the group's discussions on military deployment. Three sub-groups of the Preliminary Working Committee (PWC) for the Special Administrative Region Preparatory Committee - the law and order, affairs and cultural and education sub-groups - will meet in Beijing this weekend. They will discuss the agenda for setting up the Preparatory Committee in 1996. Mrs Fan said the deployment of PLA troops in Hong Kong and its working relationship with the Hong Kong police would be a key issue of concern. ''I have not yet had a chance to examine the distribution of work between the Hong Kong police and the British troops. My personal feeling is that the PLA should not be allowed to do what is at present prohibited in the British force,'' she said. ''And the rights enjoyed by the British force should be retained for the PLA after 1997,'' she added. Mrs Fan said the ban on British troops walking the streets in uniform should also apply to the PLA. As to military lands and the size of the PLA force, Mrs Fan said they should be left to Beijing. Which military sites should be handed to the PLA is a sticking point in the Joint Liaison Group. Mrs Fan said the PWC sub-group would not interfere with China's decision on the size of the PLA force or the location of its bases.