61-12 - Establishment of Flight Obstruction Area; Division into Districts LAST AMENDED 12/15/1961 A #flight obstruction area# is hereby established in the vicinity of any such major airport. Each #flight obstruction area# shall be divided into two parts, the Airport Approach District and the Airport Circling District, as described in this Section (and as shown, for convenient reference only, in the #flight obstruction area# maps available on request at the offices of the City Planning Commission).