1.   West Hollywood became the first city to prohibit sale of the guns in December.

2.   American law prohibits the sale of human organs, such as hearts and livers, even though there is a market for them.

3.   An independent study released Wednesday, however, concluded that most states, including Texas, are slow to enforce laws that prohibit tobacco sales to minors.

4.   At the same time, Congress needs to plug another loophole identified by Sen. Charles Schumer of New York, by prohibiting gun sales over the Internet.

5.   Attempts to persuade teen-agers not to smoke and laws prohibiting the sale of cigarettes to youngsters have failed to curb smoking.

6.   Because they pay musicians lower royalties than do traditional distributors, some performers prohibit the sale of their releases by the clubs.

7.   A city ordinance prohibits the sale of tickets for more than face value on Ballpark property.

8.   A customer would have to actively prohibit the sale by returning a letter to the financial firm.

9.   A Swiss securities law to take effect next year will prohibit the sale of important assets during a public offering.

10.   A US law known as the Pressler Amendment prohibits the sale of such armaments to a country with nuclear capability.