Central Bureau of Investigation (CBI) Special Judge O.P. Saini who was scheduled to pass the order on Saturday deferred it for October 7.
The court said the order was not ready as the records of the case were so voluminous.
The court will also decide on the same day the bail plea of former telecom secretary Shyamal Ghosh, an accused in the case.
The CBI filed a charge sheet on December 21, 2012, against former telecom secretary Ghosh and three telecom firms – Bharti Cellular, Hutchison Max Telecom (Vodafone India) and Sterling Cellular (Vodafone Mobile Service).
The case relates to the department of telecommunications allocating additional spectrum in a decision taken on January 31, 2002, when the National Democratic Alliance was in power, allegedly resulting in a loss of Rs 846 crore to the exchequer.