1.   But their cases generally involve large quantities of GHB pills and interstate sales.

2.   In theory, states already have authority to tax interstate sales made over the Internet, or by mail.

3.   Interior Secretary Bruce Babbitt, a former Arizona governor, pledged in December to propose guidelines for interstate sales of water.

4.   The federal crime bill passed in September prohibits interstate sales of lottery tickets without compacts between states.

5.   The power to regulate prices on interstate sales of electricity belongs to the Federal Energy Regulatory Commission, a low-profile independent agency.

6.   Under the law, the federal government, through FERC, has jurisdiction to regulate the interstate sale and transportation of natural gas through the pipeline system.

7.   Its duties include regulating the interstate sale and transmission of electricity.