http://www.faa.gov/uas/regulations_policies/media/UAS_Fact_Sheet_Final.pdf
"Because Federal registration is the exclusive means for registering UAS for purposes of operating an aircraft in navigable airspace, no state or local government may impose an additional registration requirement on the operation of UAS in navigable airspace without first obtaining FAA approval."
"A navigable airspace free from inconsistent state and local restrictions is essential to the maintenance of a safe and sound air transportation system."
"...even complimentary state regulation is impermissible. Field preemption reflects a congressional decision to foreclose any state regulation in the area, even if it is parallel to federal standards.”
"Because Federal registration is the exclusive means for registering UAS for purposes of operating an aircraft in navigable airspace, no state or local government may impose an additional registration requirement on the operation of UAS in navigable airspace without first obtaining FAA approval."
"A navigable airspace free from inconsistent state and local restrictions is essential to the maintenance of a safe and sound air transportation system."
"...even complimentary state regulation is impermissible. Field preemption reflects a congressional decision to foreclose any state regulation in the area, even if it is parallel to federal standards.”