921In the band 182 to 185 GHz all emissions are prohibited except for those under the provisions of No. 920.

921 In the band 182 to 185 GHz all emissions are prohibited except for those under the provisions of No. 920.

922 The band 244 to 246 GHz (centre frequency 245 GHz) is designated for industrial, scientific and medical (ISM), applications. The use of this frequency band for ISM applications shall be subject to special authorisation by the administration concerned in agreement with other administrations whose radiocommunication services might be affected. In applying this provision administrations shall have due regard to the latest relevant CCIR Recommendations.

923 The bands 250 to 251 GHz and 262.24 to 262.76 GHz are also allocated to the radio astronomy service on a primary basis for spectral line observations. In making assignments to stations of other services to which these bands are allocated, administrations are urged to take all practicable steps to protect the radio astronomy service from harmful interference. Emissions from space or airborne stations can be particularly serious sources of interference to the radio astronomy service (see Nos. 343 and 344 and Article 36).

924 The band 257.5 to 258 GHz is also allocated to the radio astronomy service on a secondary basis for spectral line observations. In making assignments to stations of other services to which the band is allocated, administrations are urged to take all practicable steps to protect the radio astronomy service from harmful interference. Emissions from space or airborne stations can be particularly serious sources of interference to the radio astronomy service (see Nos. 343, 344 and Article 36).

925 In the Federal Republic of Germany, Argentina, Spain, Finland, France, India, Italy, the Netherlands and Sweden, the band 261 to 265 GHz is also allocated to the radio astronomy service on a primary basis. In making assignments to stations of other services to which the band is allocated, administrations are urged to take all practicable steps to protect the radio astronomy service from harmful interference. Emissions from space or airborne stations can be particularly serious sources of interference to the radio astronomy service (see Nos. 343 and 344) allocation: in the Federal Republic of Germany, Denmark, Norway and Sweden, the band 4 200 to 4 210 MHz is also allocated to the fixed service on a secondary basis.

926 In making assignments to stations of other services to which the band 265 to 275 GHz is allocated, administrations are urged to take all practicable steps to protect the radio astronomy service from harmful interference, especially in the bands 265.64 to 266.16 GHz, 267.34 to 267.86 GHz and 271.74 to 272.26 GHz, which are used for spectral line observations. Emissions from space or airborne stations can be particularly serious sources of interference to the radio astronomy service (see Nos. 343 and 344 and Article 36).

927 The frequency band 275 to 400 GHz may be used by administrations for experimentation with, and development of, various active and passive services. In this band a need has been identified for the following spectral line measurements for passive services: