CBI sources said while sanction against Sita has been received, fate of other seven MLAs, for whom the sanction to prosecute was sought, is not clear.
The sources said the agency can proceed to name these MLAs in the charge sheet only when a sanction to prosecute them is received from the Governor.
They said the agency would proceed to file charge sheet against Sita and R K Agarwal, the businessman who was made accused in the Rajya Sabha polls case. The state is under President's rule since January.
The Election Commission had countermanded the Rajya Sabha polls in two seats in Jharkhand in the wake of allegations of horse trading and seizure of Rs 2.15 crore in cash from an aide of Agarwal.
The CBI had taken charge of the investigation, and conducted raids in the premises of at least 23 MLAs.