The Constitutional Court is set to announce its ruling on Monday morning, in a decision which could widely reshape political alliances ahead of the February election.

The Indonesia Solidarity Party (PSI), now chaired by President Joko “Jokowi” Widodo’s youngest son, Kaesang Pangarep, is one of the petitioners asking the court to lower the minimum age from 40 to 35 on the grounds that the existing age limit was discriminatory. Other petitions seek to maintain the current minimum age requirement but with the addition of an exception for candidates who have experience as regional heads or deputy regional heads.

Observers have called on justices to instead reject these petitions, saying that the Constitutional Court has no jurisdiction over age limits, and that the matter should instead be hashed out between lawmakers and government policymakers.

“[Age limits] have nothing to do with the Constitution. This falls under the authority of the lawmakers to decide,” Violla Reininda of the Indonesian Center for Law and Policy Studies (PSHK) told The Jakarta Post on Sunday.

Ruling in favor of the petitioners, she went on to say, would hurt the court’s credibility, particularly since it would pave the way for Jokowi’s eldest son, the 36-year-old mayor of Surakarta, Gibran Rakabumi Raka, to be named as a vice-presidential candidate.

“We can’t let the Constitutional Court be a way for some people to change the law instantly because of their vested political interests,” Violla said.