Pillai was off loaded on January 11 when she was on her way to London to meet UK lawmakers on domestic issues. However, she later addressed the gathering on 'Skype' video conference.
She will not be allowed to make deposition before foreign governments and agencies as such presentations are often allegedly used against India in international trade negotiations, a Home Ministry official said.
"No one will be allowed to appear before foreign governments and agencies badmouthing India, which ultimately brings trouble for the government in international fora.
Pillai, after being off-loaded, had approached the Delhi High Court which has observed that the government should draw a line between "nationalism and jingoism". The case is listed for hearing on February 18.
She has contended that not allowing her to go to London was "completely unlawful and malafide and without any authority of law" and demanded quashing of the alleged 'Look Out Circular' against her.
Explaining the reasons behind the decision to offload Pillai from flight, the official said she was allegedly supposed to make her presentation before some British MPs on India's environmental issues.
Submission before British MPs is akin to deposition before the United Kingdom government. It is beyond someone's comprehension how can a foreign government solve India's domestic problems, the official said.
He contended there were several redressal forums within the country besides the courts for NGOs to raise their grievances.
