Gas Price Relief for Consumers Act of 2008 - No Oil Producing and Exporting Cartels Act of 2008 or NOPEC

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Amends the Sherman Act to make it illegal for any foreign state or instrumentality thereof to act collectively or in combination with any other foreign state or any other person, when such action has a direct, substantial, and reasonably foreseeable effect on the market, supply, price, or distribution of petroleum in the United States, to: (1) limit the production or distribution of oil, natural gas, or any other petroleum product (petroleum); (2) set or maintain the price of petroleum; or (3) otherwise take any action in restraint of trade for petroleum.
Denies a foreign state engaged in such conduct sovereign immunity from the jurisdiction or judgements of U.S. courts in any action brought to enforce this Act.
States that no U.S. court shall decline, based on the act of state doctrine, to make a determination on the merits in an action brought under this Act.
Authorizes the Attorney General to bring an action in U.S. district court to enforce this Act.
Makes an exception to the jurisdictional immunity of a foreign state in an action brought under this Act.
Directs the Attorney General to establish in the Department of Justice (DOJ) a Petroleum Industry Antitrust Task Force to, among other things, develop, coordinate, and facilitate the implementation of DOJ investigative and enforcement policies related to petroleum industry antitrust issues under federal law.
Directs the Comptroller General to conduct a study evaluating the effects of mergers addressed in covered petroleum merger consent decrees on competition in the markets involved, including the effectiveness of divestitures required in such decrees in preserving competition in those markets.