The Green Party has called for another judge to be appointed to the Moriarty tribunal to hear evidence on the sale to Cement Roadstone of Glen Ding in Co Wicklow.
The sale, which took place in 1991, has since been criticised by the comptroller and auditor general because an open competition was not advertised.
The sale occurred when about 30 State forests, which were not being transferred to Coillte, were being sold.
According to An Taisce, Glen Ding was the only estate not to be the subject of a public competition. It was sold by the Department of Energy. The Green Party supported a motion in 1997 to have the sale included in the Moriarty tribunal's terms of reference.
However, the tribunal chairman, Mr Justice Moriarty, declared an interest, in that he owned shares in the company.
However, according to the Green Party's spokesman on environment, Mr Ciaran Cuffe, the recent attempt by Wicklow County Council to zone some of the land for "extractive industry" indicated it was now time for a full and public examination of all aspects of the deal.
"The Government must now appoint another judge to the Moriarty tribunal to investigate the proposed rezoning of Glen Ding woods in the Blessington local area plan."