The comment period on a proposal to continue the reservation and slot program under the high-density rule at New York La Guardia Airport (LGA) has been extended from October 30 to December 29, the result of requests from several trade groups. The program, which includes a slot-reservation system for general aviation operations (six slots are available per hour between 6:30 a.m. and 10 p.m.) is set to expire January 1. Also under the proposal an airline’s annual “average seat size” would have to meet or exceed the airport-wide target of between 105 and 122 seats at LGA or the FAA would withdraw the carrier’s operating authorization. The proposal would continue to limit the number of scheduled flights to 75 per hour.