详细说明直升机着陆区噪声测量和评估程序，并在必要时建议土地利用规划措施，以减轻噪声对直升机着陆区周围土地利用的不利影响。

Details procedures for the measurement and assessment of noise from helicopter landing areas and recommends land use planning measures where necessary to mitigate the adverse effects of noise on land uses surrounding the helicopter landing area.