14 O CFR Parte 137 regula as operações de aeronaves agrícolas, com o parágrafo 137.51 discutindo a operação em áreas congestionadas, incluindo:
The crop duster must operate “with maximum safety to persons and property on the surface” and the crop duster must have obtained prior written approval from the FAA and notice of the intended operation must be given to the public. Further, the crop duster must submit a plan to the FAA that considers the flight obstructions and plans for a possible emergency landing.
De extrema importância é a seção sobre o vôo de aeronave civil de categoria restrita como aeronave agrícola:
Sec. 91.313 — Restricted category civil aircraft: Operating limitations.
(a) No person may operate a restricted category civil aircraft— (1) For other than the special purpose for which it is certificated; or
(2) In an operation other than one necessary to accomplish the work activity directly associated with that special purpose.
...
(e) Except when operating in accordance with the terms and conditions of a certificate of waiver or special operating limitations issued by the Administrator, no person may operate a restricted category civil aircraft within the United States—
(1) Over a densely populated area;
(2) In a congested airway; or
(3) Near a busy airport where passenger transport operations are conducted.
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Mais informações estão disponíveis em este documento da FAA .