In case of Hollywood movies to be broadcasted in India, certification is a must. There are a few examples:
1)Under the A category the board usually allows the portrayal of very strong, gory, graphic, brutal and/or sadistic violence. Film such as Prometheus (R-rated in the US) have received this certificate.
2)Under the U category, only mild sexual references and sensuality is permitted. Moderate sexual references and undetailed sexuality is allowed under the UA category. Strong sexual references and detailed sexuality is restricted to A category only. Examples include Friends with Benefits and No Strings Attached, both R-rated in the United States. But in 2011, The CBFC banned the film The Girl with the Dragon Tattoo on account of heavy nudity and sexuality. Cut version is available.
3)The board is quiet strict towards censorship of profanity. Only mild language and mild swear words are allowed under the U category. Moderate profanity and swear words are permitted under the UA category. Films under the A category do not have any limitation on the bad language that is used. The strongest terms such (eg. fuck and cunt) are allowed only under the A category. Films such as The Hangover and The Hangover Part 2 (R-rated) have received this certificate.
This is the process how Hollywood films get rated by CBFC.