1.   The ban will take effect in November.

2.   Although the ban took effect in March, the prison commissaries began selling out their stocks of tobacco several months beforehand, resulting first in hoarding and then smuggling.

3.   Because of congressional legislation, the ban has never taken effect.

4.   Before the ban took effect, surveys put both coalitions neck and neck.

5.   Diesel oil has been flowing into China from refineries in other parts of Asia even though a ban on imports took effect in February.

6.   He said the education ban would take away that allure.

7.   If Brown signs the measure, the ban would take effect in six months.

8.   In a statement, Philip Morris said it was not violating the ban since the billboards were in place before the ban took effect.

9.   Just when the ban by the U.S. Federal Maritime Commission would take effect was unclear.

10.   Kate Nelson, owner of the Hollywood Palace nightclub in Hollywood, said she was forced to close her restaurant for lunch when the smoking ban took effect.