21.   It looked as though the Cowboys did not know the rule governing the use of the third quarterback.

22.   Natural gas is just beginning to be developed, and so are the business practices, laws and regulations governing its use.

23.   Now, I want to send e-mail advertising to my customer list, but I do not know the rules, regulations and laws governing such use of e-mail.

24.   Once the criminal investigation has been completed, federal officials will determine whether the marshal violated any of the guidelines that govern the use of firearms.

25.   Still, he said, they are working on a policy to govern the use of animals in the curriculum.

26.   That has led to fears of tougher regulations governing the use of encryption.

27.   The accident led to stricter guidelines governing the use of floats on days when there are high winds.

28.   The agreement means the city will tighten policies governing use of force, enhance training and improve recordkeeping.

29.   The Foreign Intelligence Surveillace Act, which governs the use of wiretaps and bugs in espionage and terrorism cases, does not.

30.   The judge said the jurors must also consider statutes governing the use of deadly physical force.