ile for child born in india to ilr parents

Hi there,
Both mom and dad on ilr , one child have British passport. We had a new addition on last month looking to get his visa from India as he born in India. Both parents are in India for last 7 months and not working. What documents we need to get my sons visa. Do we have to maintain certain amount of balance( funds maintenance)? Accommodation? And whatelse? Please advice me .sa soon as possible . Thanks for your help in advance.

See also Applying for a visa as the child of a British citizen or settled person.