The Supreme Court on Wednesday deferred till May 5 the hearing on the review petition filed by Samajwadi Party chief Mulayam Singh Yadav against an earlier court order asking the CBI to inquire into allegations of disproportionate assets against him.

A bench Justices Altmas Kabir and H L Dattu adjourned the hearing after Mulayam’s advocate argued that ordering a CBI inquiry was “erroneous” as it had several consequences for the federal structure in the country.

Contending that Section 6 of Delhi Police (Special) Establishments Act requires state's concurrence before ordering a CBI inquiry, the counsel said the issue is pending before the Constitution Bench. The five-judge bench headed by CJI had earlier this year reserved the verdict on the validity of courts ordering CBI probe.

Hoping that the verdict would be pronounced by May, the bench of Justices Kabir and Dattu posted the matter for May 5.

The former Uttar Pradesh chief minister and his family members had filed the review petition questioning an earlier directive of the apex court ordering a preliminary inquiry into the alleged disproportionate assets as claimed in a PIL.

The PIL, which sought an independent inquiry into allegations of disproportionate assets against Mulayam, his sons and a daughter-in-law, was filed by advocate Vishwanath Chaturvedi.