The Institute of Planners has added its voice to those opposing the relocation of government headquarters to the Tamar site. But it does favour using the harbourfront site at Admiralty for a new Legislative Council building and offices for the chief executive and Executive Council. The institute believes the government headquarters should remain in Lower Albert Road, seeing no urgent need to move the offices. It opposes selling the Lower Albert Road site for redevelopment to fund a relocation to Tamar. It is believed Chief Executive Donald Tsang Yam-kuen will announce plans for the harbourfront site to house the government headquarters in his maiden policy address today. Given that the development of the Tamar site will worsen traffic congestion in Central and Wan Chai, the institute believes the government should come up with measures to ease the problem. It is also urging the administration to review the height limit for buildings on the site, saying limits on development at Tamar were based on outdated assumptions. The current statutory plan permits buildings at Tamar to be 60 storeys high. 'If this height limit [is set], the government will violate its own urban planning guidelines which require protection of the ridge line and Victoria Harbour, and the principle of viewing Victoria Harbour from The Peak,' the institute says.