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              Congressional                                                      ____
           Sa  Research Service






House-Passed FAA Bill Leaves Existing

Reagan National Airport Slot and Perimeter

Rules Intact



July  27, 2023

On July 20, 2023, the House of Representatives passed Federal Aviation Administration (FAA)
reauthorization legislation H.R. 3935, leaving in place the controversial flight limits (known as the slot
and perimeter rules) at Ronald Reagan Washington National Airport (DCA). Whether or not to change
these flight limits is likely to be debated again in the near future when the Senate works on reauthorizing
FAA  program funding and civil aviation laws.
Airlines flying to and from DCA are subject to slot and perimeter rules set by federal law and regulation
(49 U.S.C. §41718; 14 C.F.R. §93.123). A slot is an Instrument Flight Rules (IFR) reservation required for
each takeoff or landing. By controlling the frequency of takeoffs and landings, a slot system is typically
put in place at airports with capacity constraint to ensure safety and optimize efficiency. Federal law and
regulation set the total number of flights that can be handled in a given period of time at DCA. A round-
trip flight serving DCA would require two slots, or a slot pair.
Flights to and from DCA are also restricted by a statutory perimeter rule that limits nonstop flights to a
1,250-mile distance unless they are granted an exemption by law. Flights of 1,250 miles or less are
referred to as within-perimeter. Exempted flights are referred to as beyond-perimeter. The perimeter
rule, which dates to the opening of Washington Dulles International Airport (IAD) in the early 1960s, was
originally designed to move most long-distance airline traffic serving the Washington, DC, area to the
new airport.
DCA  is limited to a maximum of 67 hourly slots for flights both within- and beyond-perimeter. This
maximum  was established through a combination of federal regulations and statutes. Regulations at 14
C.F.R. §93.123 established 60 hourly slots at DCA, while statutes have granted an additional maximum of
seven slots and have permitted slots to be used in different hours. The DCA slot rule has existed for over
two decades, although the statutory limitations on the number of slots available have been modified over
that period.
Prior to congressional action in 2000, all slots for flights arriving or departing DCA were required to
operate within-perimeter. As part of FAA reauthorization legislation in 2000, 2003, and 2012, Congress

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