The European Commission said Friday it wants interested parties to share their opinions on Greece's offer to grant access to 40% of lignite-fired electricity generation to competitors of state-owned electricity incumbent Public Power Corp. SA (PPC.AT).

Equal rules for all players in the Greek electricity market "is fundamental to ensure a greater choice of electricity suppliers and increase security of supply for consumers," said European Competition Commissioner Joaquin Almunia.

The commission, which has antitrust powers in the European Union, said in 2008 that Greece had infringed European competition rules by granting PPC privileged access to lignite, the cheapest way of producing electricity in the country, it said.