The court said on Wednesday that it had accepted for hearing a petition from a group of lawmakers challenging the so-called "25 percent rule".
It will also analyze, in terms of constitutional compliance, an extra component that has been added to the natural gas transmission tariff to help cover a part of the LNG terminal project's costs.
Under the current law on the LNG terminal, big gas consumers will have to purchase 25 percent of their gas from the LNG terminal, which is under construction in Klaipėda, and another 25 percent from Russia's gas giant Gazprom, which is now the country's sole gas supplier.
The natural gas import and transportation company Lietuvos Dujos (Lithuanian Gas), the fertilizer manufacturer Achema and the Lithuanian Gas Association have filed complaints with the European Commission over the mandatory purchase requirement.
Prime Minister-designate Algirdas Butkevičius said some time ago that his government might scrap the 25 percent rule. He also said that they might revise the LNG terminal's financing model. Based on the current model, gas consumers are to pay 114.1 million litas (EUR 33m) to the terminal next year and around 200 million litas in 2013 to 2014.
The terminal is planned to be launched in late 2014, with about a billion cubic meters of gas expected to be pumped via the facility in the first year of operation. It is planned that the LNG terminal in Klaipėda will have an annual capacity of 2 billion to 3 billion cubic meters.
Lithuania consumes about 3 billion cubic meters of gas annually.
