Besides the boarder rule, there were still other rules: ex. the giant must get their body paint done before going into the human city. And deviation would result in the cancellation of participation of the Giant Pulikali for the rest of his life.

"Hey, quickly! This year is the NCY NO Boarder Year! No one wants to miss it!"
"Patience, young man, you the the rules of body painting! NCY is not going anywhere."
"Don't you see Suraj and Arju? I don't think NYC could last 3 min!"