On the other hand, President Kgalema Motlanthe yesterday stuck to his guns that he would not institute a judicial commission of inquiry into the arms deal, parallel to the Scopa hearings.
Scopa will also hear whether or not the ANC benefited from the deal as some of the written submissions had suggested that the ruling party had more questions to answer.
Scopa resolved yesterday to call four state entities, including the National Prosecuting Authority (NPA), to give oral evidence about their own investigations of some aspects of the arms deal.
Among others, the NPA will have to tell Parliament whether or not they had probed alleged links between the companies of convicted fraudster Schabir Shaik and a company believed to belong to the ANC.
The queries are contained in a submission to Scopa by its former deputy chairman and author of a book on the arms deal, Andrew Feinstein.
Feinstein's submission came in response to last year's public call by Scopa for new evidence into the saga.
Affected government departments and other institutions were asked by Scopa in November last year to provide information on the progress of investigations into the arms deal.
The committee agreed yesterday that the answers by the NPA, the Department of Public Service and Administration, the Department of Trade and Industry and Armscor had been insufficient, warranting a public hearing.
Feinstein's 2007 book suggested that there was more evidence that the ruling party had bankrolled election campaigns through arms deal kick-backs.
ANC MP John Gumede argued yesterday that evidence of the allegations should be turned over to the Scorpions, whose fate has been sealed and the NPA, adding it should not be considered by Scopa.
Scopa chairman Themba Godi agreed this was a matter that the NPA had to investigate and suggested that Feinstein's and other submission be used as a basis for questions in next week's hearings.
"We can't say to him (Feinstein) come and make a presentation," Godi said.