> No rules matter
I was only briefly in India and did not drive while there, but the one rule that everyone adhered to was: communicate what you're doing by honking.
If you are stopped: honk to let people know.
If you are moving: honk to let people know.
If you are turning: honk to let people know.
If you are proceeding straight: honk to let people know.
If you are on a motorbike or in an autorickshaw: honk twice to let people know.
Etc.