Vishwendra Singh, the then deputy secretary (Home) of Delhi government, submitted an affidavit before district judge J R Aryan seeking "privilege" for not producing the complete file containing the official notings.
Singh, a prosecution witness and now private secretary of LG of Delhi, was earlier asked by the court to produce records relating to grant of sanction to prosecute Kumar.
However, Singh had sought time to seek permission from the LG office for showing records of sanction of January, 1, 2010.
His plea for privilege was opposed by Sajjan's counsel.
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Meanwhile, the court fixed February 5 for arguments on Singh's contention before the court.
He is a formal prosecution witness, who has been brought by the CBI to prove sanction to prosecute Sajjan Kumar and other accused under section 153A (causing disharmony between different communities) and 295 (injuring or defiling place of worship with intent to insult the religion of any class) of the IPC.
The court had on January 10 commenced the trial in the case by recording the statement of Singh who was unable to give details regarding the sanction issue without looking at the documents.