A permit holder must NOT carry a concealed firearm into:

Any facility of a law enforcement agency.
A prison, city or county jail, or detention facility.
A courthouse or courtroom.
A public airport and/or a public building that is located on the property of a public airport.
A public building that has a metal detector at each public entrance.
A public building that has a sign posted at each public entrance indicating that no firearms are allowed in the building.
Any facility of a public or private school without written permission.
Any facility of a vocational/technical school, or the University of Nevada, or Community College System without written permission.
Any other building owned or occupied by the Federal Government, the state, or local government.
Any other place where carrying a concealed firearm is prohibited by state or federal law.

and the link:
http://www.lvmpd.com/Permits/firearms_concealed.html