Union Government
(1) If a question of law or fact of such public importance arises that the President finds it expedient to seek the Supreme Court's opinion, the President may refer it to the Court, which may report its opinion after such hearing as it thinks fit. (2) The President may similarly refer certain treaty/agreement-related disputes (of the kind excluded from Article 131's jurisdiction) for the Supreme Court's opinion.
The President can proactively ask the Supreme Court for its legal opinion on an important question, even without an actual pending court case - the Court then gives an advisory opinion (though, notably, the President isn't constitutionally bound to follow it, unlike an ordinary binding judgment).
This "Presidential Reference" power has been used for genuinely significant national questions - for example, seeking the Supreme Court's opinion on the legal status of a disputed structure before deciding how the government should proceed.