Former buildings chief Leung Chin-man has been cleared of misusing his powers when he granted bonus land to property giant Henderson Land that helped it reap a $3.2 billion windfall at its Grand Promenade project. The finding was made by an independent investigation panel appointed by the government in response to a critical Audit Commission report and ferocious attacks by legislators. While the panel 'disagreed' with Mr Leung's decision, it believed the official had discretionary powers in such cases and there was no evidence he had used them incorrectly, according to a source close to the investigation. Because of public concern, the government plans to release the panel findings quickly, as early as today, the source said. The panel also made recommendations, including that future land leases should specify the maximum gross floor area of developments. The three-member panel - non-permanent Court of Final Appeal judge Justice Barry Mortimer, former Housing Authority chairman Cheng Hon-kwan and senior counsel Anthony Chan - gave the report to Chief Executive Donald Tsang Yam-kuen last month. But the government had to seek legal advice from Secretary of Justice Wong Yan-lung on whether to publish the report as Mr Leung has filed a judicial review against the auditor's report. The committee examined the procedures followed in approving the site classification, gross floor area, exemption of a Public Transport Terminus from the gross floor area and the granting of bonus land in return for a reserved area for public passage at the Sai Wan Ho site. The bonus land grant, together with the Planning Department's failure to stipulate a maximum gross floor area in the land lease, allowed the developer to double the number of flats in the development. As a result, Henderson obtained an estimated extra $3.2 billion from the project for an additional premium of just $6 million. The Public Accounts Committee, in a report released early this year, said Mr Leung, in his capacity as the Buildings Authority, had failed to uphold the guidelines in the exercise of his discretionary powers, costing the government at least $125 million revenue. But the source said the inquiry panel found the use of the powers were open to different interpretations and that Mr Leung did nothing wrong.