Any grammatical errors here? If there are, edit them please

There is no concept such as residence registration for Indians. Any Indian can live wherever he/she likes to around the country as long as the place he/she chooses no one resides. No procedure or payment is required. I've seen a lot of people living at the Parliament Square (the splendour and high political position of it is like that of China's famous Tiananmen Square) and no administrative staff or police intervenes. There are many clearings in the urban area of New Delhi. If someone wants to live there, he/she can have a house build on one of them and live in it. The local law states that if anyone who builds a house on a clearing and has been living there for 30 years or more, he/she can permanently possess the land. Government does not have the power to demolish it. As a result, India does not have any expressways.

Ori I'd agree Snj is pretty good at this. As far as grammar, however,

…….as long as (in, at) the place he/she chooses no one resides…….no administrative staff (n)or police intervene(s?)…….

Otherwise Ori it's a little wordy and a few further improvements could be made here and there but you had asked only about grammar

Cool. It is very clear now.
Thank you.

PS. I wonder whether Contrex or JTT would like to point out the use of singular they.

What a coincidence that you are an Indian.
I wonder whether the passsage says is true or not.

I wonder whether WHAT the passsage says is true or not.

Maybe they will.

It is fine to use "they" to stand for he/she in that sentence. It can stand for a singular person.

Them 'uns?

That's Frank Apisa's job, Ori, or Roberta's.