The order was passed by Justice R M Sawant who dismissed a petition filed by RTI activist Shailesh Gandhi.
Gandhi had challenged the Chief Information Commissioner's order rejecting his plea seeking the NCP leader's IT returns.
He had approached the Central Public Information Officer of the Income Tax department in 2009 under the Right to Information Act but the information was refused to him on the ground that he was a third party.
The CPIO told Gandhi that the information sought by him had nothing to do with any public activity or interest and therefore it could not be furnished.
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In his appeal before the first appellate authority, Gandhi cited section 8(1) of RTI Act, which says that any information which cannot be denied to Parliament or a state legislature shall not be denied to any person.
But the first appellate authority rejected his plea, so he moved the HC.