The question is, what are the emergency laws of India? Is there an article in the constitution which outlines the laws of emergency?
The following is just re-iterating information in public domain.
Article 19 of the constitution of India guarantees the Freedom of speech and expression as a Fundamental Right - however, with quite a few restrictions.
The right is available only to the citizens of India - the BBC is not an Indian citizen.
The constitution allows government to have reasonable restrictions on the exercise of the right - specifically in the interests of
i. the sovereignty and integrity of India,
ii. the security of the State,
iii. friendly relations with foreign States,
iv. public order, decency or morality,
or in relation to contempt of court, defamation or incitement to an offence.
On Jan 20, the central government used this restriction, and banned the documentary, with officials saying it has been found to be “undermining the sovereignty and integrity of India” and has “the potential to adversely impact” the country’s “friendly relations with foreign states” and “public order within the country”.
The Secretary, Information and Broadcasting Ministry had issued the directions in his capacity as Authorised Officer under Rule 13(2) of The IT Rules 2021 to take down all online presence of the documentary in India.