The authorities in the northern Indian state of Bihar have banned the use of a tobacco powder - known locally as gutka - that many people in northern India are addicted to chewing.
Those who violate the ban, which has been imposed for for five years, face a two-year prison term.
Health authorities say the ban has been imposed because the tobacco powder causes cancer.
The decision was made despite strong opposition from the Bihar government's commercial taxes department, which is expected to lose more than one and a half million dollars in annual revenue.
There are similar bans in such other Indian states as Maharashtra and Karnataka.
From the newsroom of the BBC World Service