Amends Federal aviation law to authorize the Secretary of Transportation to grandfather, that is, apportion airport development and noise compatibility program funds to a primary airport sponsor in a fiscal year in an amount equal to that apportioned to such sponsor in the previous fiscal year if the Secretary finds: (1) passenger boardings at such airport are below 10,000 in the calendar year used to calculate the apportionment as a result of the discontinuance of air carrier service to and from the airport in any of the three calendar years preceding the calendar year used for such calculations; and (2) the airport had at least 10,000 passenger boardings in any of such three preceding calendar years.