The petition filed by NGO Common Cause alleged that a "complete non-transparency" procedure was followed in the appointment of K V Chaudhary as CVC and T M Bhasin as VC of the Central Vigilance Commission.
While Chaudhary was appointed as CVC on June 6, Bhasin took charge as the VC on June 11 this year.
The PIL alleged that their appointments were "arbitrary, illegal and in violation of the principle of institutional integrity".
It said that this complete non-transparency renders the appointment "void and illegal", and in violation of Article 14 of the Constitution.