New Delhi, Oct. 2 -- There's a new tariff in town. US President Donald Trump's announcement of a 100% tariff on film imports surely made many Burbank studio executives choke on their Monday-morning kale juice.

Even though foreign films are hardly any competition to Hollywood fare in America, the question remains, what exactly constitutes a 'Made in USA' film? It's like asking what characterizes an American cheeseburger. Is it the bread, the mince, the cheese or the patty flipper in the kitchen?

Modern film production pipelines are a confluence of talent and processes from far and wide across the world. The $2.8 billion-earning Avengers finale, adapted from US comic books, features American Chris Evans as Captain America, Australian Chri...