Adopted by the parliamentary inquiry commission last month, the report puts most of the blame on the economy and finance ministers in the first Janša government, Andrej Vizjak and Andrej Bajuk (1943-2011), and the economy and finance ministers in Pahor's cabinet, Matej Lahovnik and Franc Križanič. Janša and Pahor bear chain-of-command responsibility, the report says.

According to the commission, it took six years, until 2013, for the National Review Commission to establish that TEŠ and eleven other energy companies should be subject to public procurement rules.

The initial mistake was made by the first Janša government (2004-2008), which compiled the list of entities subject to public procurement rules in line with the new EU directive, but excluded the twelve companies in the procedure.

The next government, headed by Pahor, is responsible for not fixing the anomaly.

The report, passed in a 59:0 vote, was endorsed by all parties but the opposition Democrats (SDS), which however did not oppose it.

The party's MP Danijel Krivec (SDS) said the exclusion of the twelve energy companies could not have been the key reason for the anomalies at TEŠ6, whose costs ballooned from the initial EUR 650m to the EUR 1.4bn. No law can ensure the implementation of such a project if the people directly involved do not play by the rules, he added.

Hanžek told the MPs that the commission would draft the final report by the end of January and then still have a month to discuss it.