The Constitutional Court (in Lithuanian Konstitucinis Teismas) is an independent court which reviews the lawfulness of different laws and regulations in Lithuania.
The Constitutional Court works on the basis of the Constitution and the Constitutional Court Law.
The Court may declare laws or regulations invalid if it determines that they conflict with a higher law or the Constitution. You can only apply to the Constitutional Court if you believe that a certain law violates those human rights which are laid out in the Constitution.
Only the Court and the institution that adopted the law or regulations and can annul them. The Court can also choose the date from which a law has lost its force. For example, the Court may declare that the law you are complaining about was invalid all along and its application in your case violated your human rights. Or, it can decide that the law will no longer be in force from the day of the judgement, but it was valid and in force when it was applied to you.
The decisions and judgements of the Constitutional Court are binding and they cannot be appealed.