There is no such law in India which requires a person to stand up when National Anthem in being played. The home ministry makes a suggestion only.
The Home Ministry rules state:
"Whenever the Anthem is sung or played, the audience shall stand to
attention. However, when in the course of a newsreel or documentary the
Anthem is played as a part of the film, it is not expected of the audience to stand as standing is bound to interrupt the exhibition of the film and
would create disorder and confusion rather than add to the dignity of the
Anthem."
So as you see it is just a mere suggestion that people stand up.
However, folks that where harassing the man on wheelchair for not standing up actually broke the law as they were creating a fracas when the national anthem was being played,
Here is the penal code,
"according to the Prevention of Insults to National Honour Act 1971, anyone who intentionally prevents the singing of the Indian National Anthem or causes disturbances to any assembly engaged in such singing shall be punished with imprisonment for a term, which may extend to three years, or with fine, or with both"
View attachment 346941
Right, there is no LAW in India that makes some one stands up and salute the National Flag or respect the national anthem.
Nobody said there is any such LAW. Does that clear your confusion ?
It would be a sad day for India when respect has to be enforced by law.