ADVOKS GLOBAL · KENYA
The Civil Aviation (Environmental Protection Aircraft Noise) Regulations, 2025
35. Noise certification reference procedures-General conditions.
Edition: 2026-03-03 · In force
35. Noise certification reference procedures-General conditions.
(1)The reference procedures shall comply with the airworthiness requirements specified by the Authority.(2)The calculations of reference procedures and flight paths shall be approved by the Authority.(3)Except in conditions specified under regulation 35(4), the take-off and approach reference procedures shall be those defined in regulation 36 and 37, respectively.(4)Where an applicant demonstrates that the design characteristics of the aeroplane would prevent flight being conducted in accordance with 36 and 37, the reference procedures shall—(a)depart from the reference procedures defined in 36 and 37 only to the extent demanded by those design characteristics which make compliance with the procedures impossible; and(b)be approved by the Authority.(5)The reference procedures shall be calculated under the following reference atmospheric conditions—(a)atmospheric pressure at sea level of 1 013.25 hPa, decreasing with altitude at a rate defined by the ICAO Standard Atmosphere;(b)ambient air temperature at sea level of 25°C, decreasing with altitude at a rate defined by the ICAO Standard Atmosphere (i.e. 0.65°C per100 m), except that at the discretion of the certificating authority, an alternative ambient air temperature at sea level of 15°C may be used;(c)constant relative humidity of 70 per cent;(e)the reference atmosphere in terms of temperature and relative humidity is considered to be homogeneous (i.e. ambient temperature 25°C and relative humidity 70 per cent) for the purpose of calculating—(i)the reference sound attenuation rate due to atmospheric absorption; and(ii)the reference speed of sound used in the calculation of the reference sound propagation geometry.