RAWALPINDI Accountability Court (AC) No 4 here on Monday rejected an application of National Accountability Bureau (NAB) for not reopening corruption references against the co-accused where President Asif Ali Zardari is one of the accused. The AC Judge Tariq Abbasi rejected the NAB application filed regarding Ursus Tractor and Polo Ground references and observed that prosecution had no authority to request for reopening or closing the references. The court further observed that it did not suit the prosecution to submit application before the court for not reviving the cases of co-accused, as the main accused had immunity, and this application should be moved through the co-accused and not through prosecution. Earlier, the NAB had moved the application before the court that President Zardari under Article 248 of the Constitution had the immunity to appearing before the courts in the cases pending against him. Since he is the main accused in these cases, the co-accused could not be tried in the absence of the main accused. In Ursus Tractor corruption reference, besides former premier and slain PPP chairperson Ms Benazir Bhutto and President Asif Ali Zardari, former federal agriculture minister Yousaf Talpur and others were co-accused. In the reference, it was charged that during her second term as PM, Benazir Bhutto in connivance with others awarded Ursus tractors import contract and had taken kickbacks in the deal. In Polo Ground corruption reference, the main allegation is that Asif Ali Zardari constructed a polo ground in the Prime Ministers House. Separately, the Judge Najamul Hasan Najam rejected the NAB application in the Cotecna corruption reference. In the reference, it had been alleged that former prime minister Benazir Bhutto and her husband President Asif Ali Zardari were accused of taking six percent of the total revenue of pre-shipment for awarding a contract. It is alleged that they received $ 11.8 million as kickbacks for $ 131 million contract.