The interim final rule (IFR), published by the Transportation Security Administration (TSA) on July 19, 2005, created a new part 1562, subpart B, for general aviation (GA), in title 49 of the Code of Federal Regulations (CFR). The IFR restored access to Ronald Reagan Washington National Airport (DCA) for passenger aircraft operations not otherwise regulated under 49 CFR 1546.101(a) or (b) (foreign air carriers) or 49 CFR part 1544 (U.S. air carriers operating under a full security program). From September 11, 2001, until the IFR became effective on August 18, 2005, GA aircraft operations had been prohibited at DCA. The IFR reopened access to the extent requirements are met to maintain the security of critical Federal Government and other assets in the Washington, DC metropolitan area. In general, this rule requires GA aircraft operators to adopt and carry out security measures that are comparable to the security measures required of regularly scheduled, commercial aircraft. This rule also established security procedures for GA aircraft operators and gateway airport operators, and security requirements relating to crewmembers, passengers, and armed security officers onboard aircraft operating to or from DCA. TSA plans to take final action on the IFR to respond to the public comments and close out this rulemaking.