"The hearing of the case was adjourned until June 18, because the justices decided that very complex issues are being raised and they need more time for a deeper examination of the complex questions of law," Rūta Bučinskaitė, the court's spokeswoman, told BNS.
The seven-strong panel was appointed for the hearing in mid-May. Gazprom's complaint is being heard by way of written procedure.
A panel of justices is normally appointed for the hearing of particularly complex and large scale cases.
Gazprom has appealed against a decision by the Lithuanian Court of Appeals, dated December 17, 2102, not to recognize and enforce in the country the Stockholm Arbitration Tribunal's ruling regarding its natural gas price for Lithuania.
Russia's gas giant then said that the court's decision raised doubts as to Lithuania's readiness to meet its international commitments and showed a failure in protecting foreign investors' rights in the country.
The Russian supplier said that Lithuania had not only breached the requirements of Lietuvos Dujos' (Lithuanian Gas) shareholder agreement, but had also refused to enforce an international arbitration award.
Meanwhile, the Court of Appeals judicial panel stated that recognizing and enforcing the arbitration court's decision in Lithuania would go against the country's public policy.
Lithuania's former government said that Gazprom was applying discriminatory prices to the country, which is the first Baltic state that is implementing the EU's third energy package and aims to unbundle the assets of Lietuvos Dujos, in which the Russian supplier holds a significant stake, by the end of 2014.
