"The right of Israel to execute archaeological work in the region is well-embedded in international law and interim agreements with the Palestinians, " says Hananya Hizmi, head of the ADCA, which operates according to pre-existing Jordanian law.

BBC: Middle East

Lawmakers and traditional law-enforcement agencies, in particular the FBI, resisted extending the power to carry firearms, execute warrants and make arrests to other agencies, says Jeffrey Bumgarner, a professor of government at Minnesota State University who has written a history of federal law enforcement.

WSJ: Federal Offenses: Law-Enforcement Teams Grow at U.S. Government Agencies