(309A) Space stations employing frequencles in the band 267-273 Mc/s for telemetering purposes may also transmit tracking signais in the band.

(309B) In the band 267-272 Mc/s individual administrations may use space telemetering in their countries on a primary basis, subject to the agreement of the administrations concerned and those having services operating in accordance with the Table, which may be affected.

(310) Radio astronomy observations on the Deuterium line (322-329 Mc/s) are carried out in a number of countries under national arrangements. Administrations should bear in mind the needs of the radio astronomy service in their future planning of this band.

(311) Limited to Instrument Landing Systems (glide path).

(311A) Stations operating in the fixed and mobile services may continue to use this band until 1 January 1969. This cessation date shall not apply in Bulgaria, Cuba, Greece, Hungary, Iran, Kuwait, Lebanon, Morocco, the United Arab Republic and Yugoslavia where the fixed and mobile services will continue to have equal status with the radionavigation-satellite service. (See Recommendation No. 6A.)

1315A) Space stations employing frequencies between 01-402 Mc/s for telemetering purposes may also transmit tracking signals in this band.

(317) The band 404-410 Mc/s in Region 2 and the band 406-410 Mc/s in Regions 1 and 3 are also allocated to the radio astronomy service. An appropriate continuous band within these limits shall be designated on a national or area basis. In making assignments to stations of other services to which these bands are allocated, administrations are urged to take all practicable steps to protect radio astronomy observations from harmful interference.

(318) Radio altimeters may also be used, temporarly, in the band 420-460 Mc/s until they are able to operate in a band allocated to the aeronautical radionavigation service until they are no longer required. 318A) In Bulgaria, Cuba, Hungary, Poand Roumania, Czechoslovakia and the USSR, the band 460-470 Mc/s may be used,

primary basis, by the meteorologicalte service subject to agreement among Administrations concerned and those having services or intending to introduce services, perating in accordance with the Table, h may be affected.

GA) The band 449.75-450.25 Mc/s may be and for space telecommand, subject to greement among the administrations conerbed and those having services operating accordance with the Table, which may be ferted.

124A) It is intended that meteorologicalatelite space stations operating in this band stal transmit to selected earth stations. The location of such earth stations is subject

to agreement among administrations concerned and those having services operating in accordance with the Table, which may be affected.

(332) In Region 1, except the African Broadcasting Area, the band 606-614 Mc/s, and in Region 3, the band 610-614 Mc/s may be used by the radio astronomy service. Administrations shall avoid using the band concerned for the broadcasting service as long as possible, and thereafter, as far as practicable, shall avoid the use of such effective radiated powers as will cause harmful interference to radio astronomy observations. In Region 2, the band 608-614 Mc/s is reserved exclusively for the radio astronomy service until the first Administrative Radio Conference after 1 January 1974 which is competent to review this provision; however, this provision does not apply to Cuba.

(339A) Specific portions of the frequency band 900-960 Mc/s may also be used, on a secondary basis, for experimental purposes in connection with space research.

(340) In Region 2, the frequency 915 Mc/s is designated for industrial, scientific and medical purposes. Emissions must be confined within the limits of ±25 Mc/s of that frequency. Radiocommunication services operating within those limits must accept any harmful interference that may be experienced from the operation of industrial, scientific and medical equipment.

(341) The band 960-1215 Mc/s is reserved on a world-wide basis for the use and development of airborne electronic aids to air navigation and any directly associated ground-based facilities.

(346) The use of the bands 1300-1350 Mc/s, 2700-2900 Mc/s and 9000-9200 Mc/s by the aeronautical radionavigation service is restricted to ground-based radars and, in the future, to associated airborne transponders which transmit only on frequencies in these bands and only when actuated by radars operating in the same band.

(350A) Space stations employing frequencies in the band 1525-1540 Mc/s for telemetering purposes may also transmit tracking signals in the band.

(350D) In Cuba, the band 1525-1535 Mc/s is also allocated, on a primary basis, to the mobile service.

(352A) The bands 1540-1660 Mc/s, 42004400 Mc/s, 5000-5250 Mc/s and 15.4-15.7 Gc/s are reserved, on a world-wide basis, for the use and development of airborne electronic aids to air navigation and any directly associated ground-based or satellite-borne facilities.

(352B) The bands 1540-1660 Mc/s, 50005250 Mc/s and 15.4-15.7 Gc/s are also allocated to the aeronautical mobile (R) service for the use and development of systems using space communication techniques. Such use and development is subject to agreement and co-ordination between administrations concerned and those having services operating

in accordance with the Table, which may be affected.

(353A) In view of the successful detection of two spectral lines in the region of 1665 Mc/s and 1667 Mc/s by astronomers, administrations are urged to give all practicable protection in the band 1664.4-1668.4 Mc/s for future research in radio astronomy.

(354A) In Algeria, Bulgaria, Cuba, Hungary, Kuwait, Lebanon, Morocco, Pakistan, Poland, the United Arab Republic, Yugoslavia, Roumania, Czechoslovakia and the U.S.S.R., the bands 1660-1670 Mc/s and 16901700 Mc/s are also allocated to the fixed service and the mobile, except aeronautical mobile, service.

(355A) In Cuba, the band 1700-1710 Mc/s is also allocated to the fixed and mobile services.

(356AA) In Bulgaria, Cuba, Hungary, Poland, Roumania, Czechoslovakia, and the U.S.S.R., the meteorological-satellite service, in the band 1770-1790 Mc/s, shall be on a primary basis, subject to co-ordination with the administrations concerned and those having services operating in accordance with the Table, which may be affected by the siting of earth stations.

(356A) The band 2110-2120 Mc/s may be used for telecommand in conjunction with spacecraft engaged in deep space research, subject to agreement between the administrations concerned and those having services operating in accordance with the Table, which may be affected.

(356B) In Cuba, the band 2290-2300 Mc/s is also allocated to the fixed and mobile services.

(357) The frequency 2450 Mc/s is designated for industrial, scientific and medical purposes except in Albania, Bulgaria, Hungary, Poland, Rumania, Czechoslovkia, and the U.S.S.R., where the frequency 2375 Mc/s is used. Emissions must be confined within +50 Mc/s of the frequencies designated. Radiocommunication services operating within these limits must accept any harmful interference that may be experienced from the operation of industrial, scientific and medical equipment.

(364A) In Algeria, Bulgaria, Cuba, Hungary, India, Israel, Kuwait, Lebanon, Morocco, Pakistan, the Philippines, Poland, the United Arab Republic, Yugoslavia, Roumania, Czechoslovakia and the U.S.S.R., the band 2690-2700 Mc/s is also allocated to the fixed and mobile services.

(365) In making assignments to stations in the fixed and mobile services, administrations are urged to take all practicable steps to protect radio astronomy observations from harmful interference.

(366) In the band 2700-2900 Mc/s groundbased radars used for meteorological purposes are authorized to operate on the basis of equality with stations of the aeronautical radionavigation service.

(367) The use of the band 2900-3100 Mc/s by the aeronautical radionavigation service is limited to ground-based radars.

(369) In the band 8100-3300 Mc/s, existing racons and shipborne radars in merchant ships may operate within the band 31003266 Mc/s.

(374A) This band may also be used for the transmission of tracking and telemetering signals associated with communication-satellite space stations operating in the same band.

(383A) In Cuba, the band 4990-5000 Mc/s is also allocated to the fixed and mobile services, and the provisions of No. 365 apply.

(385) The use of the band 5350-5470 Mc by the aeronautical radionavigation service is limited to airborne radars and associated airborne beacons.

(387) Between 5600 and 5650 Mc/s, groundbased radars used for meteorological purposes are authorized to operate on the basis of equality with stations of the maritime radionavigation service.

(389A) In Bulgaria, Cuba, Hungary, Poland, Roumania, Czechoslovakia and the U.S.S.R., the space research service is a primary service in the band 5670–5725 Mc/s.

(391) The frequency 5800 Mc/s is designated for industrial, scientific and medical purposes. Emissions must be confined within the limits of +75 Mc/s of that frequency. Radiocommunication services operating within those limits must accept any harmful interference that may be experienced from the operation of industrial, scientific, and medical equipment.

(392A) This band may also be used for the transmission of telecommand signals associated with communication-satellite stations operating in the same band.

earth

(392C) Stations of the fixed and mobile services, previously authorized in the bands 7250-7300 Mc/s and 7975-8025 Mc/s, may continue to operate until 1 January 1969. This provision does not apply to the countries listed in Nos. 392G and 392H.

(392D) As an exception, passive communication-satellite systems also may be accommodated in the band 7250-7750 Mc/s, subject to:

(a) Agreement between administrations concerned and those whose services, operating in accordance with the Table, may be affected;

(b) The co-ordination procedure laid down in Articles 9 and 9A.

Such systems shall not cause any more interference at active earth station receivers than would be caused by fixed or mobile services. Power-flux density limitations at the earth's surface after reflection from the passive communication-satellites shall not exceed those prescribed in these Regulations for active communication-satellite systems.

The maximum effective power radiated in any direction in the horizontal plane by earth stations of passive satellite systems shall not exceed +55 dbW, not taking the site shielding factor into account. If the distance between a transmitting station of a passive system and the territory of another adminis

tration exceeds 400 km, this limitation may be increased in that direction by 2 db for each 100 km in excess of 400 km up to a maximum of 65 dbW.

(392F) In the bands 7200-7250 Mc/s and 7300-7750 Mc/s, the meteorological-satellite service may use a band up to 100 Mc/s in width on a primary basis. These bands may also be used for the transmission of tracking and telemetering signals associated with meteorological-satellite space stations operating in the same band.

(392G) In Algeria, Austria, Bulgaria, Cyprus, Cuba, Ethiopia, Finland, Hungary, Japan, Kuwait, Lebanon, Liberia, Malaysia, Morocco, the Philippines, Poland, the United Arab Republic, Yugoslavia, Roumania, Sweden, Switzerland, Czechoslovakia, and the USSR., the band 7250-7300 Mc/s is also allocated to the fixed and mobile services.

(392H) In Algeria, Bulgaria, Cuba, Ethiopia, Finland, Hungary, Japan, Kuwait, Lebanon, Morocco, Poland, the United Arab Republic, Yugoslavia, Roumania, Sweden, Switzerland, Czechoslovakia, and the USSR., the band 7975-8025 Mc/s is also allocated to the fixed and mobile services.

(393A) The band 7120-7130 Mc/s may be used for telecommand in association with space services, subject to agreement between the administrations concerned and those having services operating in accordance with the Table, which may be affected.

(394C) In Cuba, the band 8400-8500 Mc/s is also allocated to the fixed and mobile services.

(396) The use of the band 8750-8850 Mc/s by the aeronautical radionavigation service is limited to airborne Doppler navigation aids on a centre frequency of 8800 Mc/s.

(399) The use of the band 9300-9500 Mc/s by the aeronautical radionavigation service is limited to airborne weather radars, and ground-based radars. In this band groundbased radars used for meteorological purposes have priority over other radiolocation devices.

(401A) The band 9975-10025 Mc/s may be used by weather radar on meteorologicalmatellites.

(404) Limited to continuous wave systems. (405B) In Algeria, Bulgaria, Cuba, Hungary, Japan, Kuwait, Lebanon, Pakistan, Poland, the United Arab Republic, Yugoslavia, Boumania, Czechoslovakia, and the U.S.S.R., the band 10.68-10.7 Gc/s is also allocated to the fixed and mobile services.

(406) Limited to Doppler navigation aids. 1409A) In Algeria, Bulgaria, Cuba, Hungary, Kuwait, Lebanon, Morocco, Pakistan, Poland, the United Arab Republic, Yugoalaria, Roumania, Czechoslovakia, and the USSR, the band 15.25-15.35 Gc/s is also Allocated to the fixed and mobile services.

(409C) In Algeria, Bulgaria, Cuba, Hunpary. Kuwait, Lebanon, Morocco, Pakistan, Poland, the United Arab Republic, Yugoslavia, Roumania, Czechoslovakia, and the

31 094-66- -16

U.S.S.R., the band 15.35-15.4 Gc/s is also allocated to the fixed and mobile services.

(409D) In Bulgaria, Cuba, Hungary, Kuwait, Lebanon, Poland, the United Arab Republic, Roumania, Czechoslovakia, and the U.S.S.R., the band 19.3-19.4 Gc/s is also allocated to the fixed and mobile services.

(410) The frequency 22.125 Gc/s is designated for industrial, scientific and medical purposes. Emissions must be confined within the limits of +125 Mc/s of that frequency. Radiocommunication services operating within those limits must accept any harmful interference that may be experienced from the operation of industrial, scientific, and medical equipment.

(411) In the band 24.25-25.25 Gc/s, ground-based radionavigation aids are not permitted except where they operate in cooperation with airborne or shipborne radionavigation devices.

(412A) In Bulgaria, Cuba, Hungary, Poland, the United Arab Republic, Roumania, Czechoslovakia, and the U.S.S.R., the band 31.3-31.5 Gc/s is also allocated to the fixed and mobile services.

(412B) In Bulgaria, Cuba, Hungary, Poland, Yugoslavia, Roumania, Czechoslovakia, and the U.S.S.R., the space research service is a primary service in the band 31.832.3 Gc/s.

(412C) In Bulgaria, Cuba, Hungary, Poland, Roumania, Czechoslovakia, and the U.S.S.R., the space research service is a primary service in the band 34.2-35.2 Gc/s.

(412D) The band 34.4-34.5 Gc/s may be used by weather radar devices on meteorological satellites for the detection of cloud.

(412E) In Bulgaria, Cuba, Hungary, Poland, Yugoslavia, Roumania, Czechoslovakia, and the U.S.S.R., the band 36.537.5 Gc/s is also allocated to the radio astronomy service.

(412F) In Cuba and India, the band 3333.4 Gc/s is also allocated to the radio astronomy service.

(412G) In Bulgaria, Cuba, Hungary, Poland, Yugoslavia, Roumania, Czechoslovakia and the U.S.S.R., the band 33.4-34 Gc/s is also allocated to the radio astronomy service.

(412H) In Bulgaria, Cuba, Hungary, Poland, Roumania, Czechoslovakia, and the U.S.S.R., the space research service is a primary service in the band 31-31.3 Gc/s.

NG FOOTNOTES

75.4-76 Mc/s listed in column 10 for operational fixed stations in these services.

NG2 Facsimile broadcasting stations may be authorized in the band 88-108 Mc/s.

NG3 Fixed stations in the domestic fixed public service and control stations in the domestic public radio services may be authorized to use any of the frequencies in the band 72–73 and 75.4-76 Mc/s indicated in column 10 on the conditions that (a) harmful interference will not be caused to the reception of television stations on channels 4 or 5 and (b) that harmful interference will not be caused to operational fixed stations.

NG4 The use of the frequencies in the band 152.84-153.38 Mc/s may be authorized, in any area, to remote pickup broadcast base and mobile stations on the condition that harmful interference will not be caused to the industrial radio services.

NG5 Licensees in the public safety radio services holding a valid authorization on June 30, 1958, to operate in the frequency band 156.27-157.47 Mc/s or on the frequencies 161.85, 161.91 or 161.97 Mc/s may, upon proper application, continue to be authorized for such operation, including expansion of existing systems, until such time as harmful interference is caused to the operation of any authorized station other than those licensed in the public safety radio service. NG6 Stations in the public safety radio services authorized as of June 30, 1958, to use frequencies in the band 159.51-161.79 Mc/s in areas other than Puerto Rico and the Virgin Islands may continue such operation, including expansion of existing systems, on the condition that harmful interference will not be caused to stations in the services to which these bands are allocated. In Puerto Rico and the Virgin Islands this authority is limited to frequencies in the band 160.05-161.37 Mc/s. No new public radio service system will be authorized to operate on these frequencies.

NG8 Frequencies in this band will be selected for assignment in such a manner that, on an engineering basis, the lowest frequency in the band is assigned which will not cause harmful interference to stations in that area already assigned frequencies in accordance with the Table of Frequency Allocations.

NG9 Aural broadcast intercity relay stations may be authorized to use the band 942-952 Mc/s on the condition that harmful interference will not be caused to other classes of stations operating in accordance with the Table of Frequency Allocations.

NG10 Frequencies in this band will be selected for assignment in such a manner that, on an engineering basis, the highest frequency in the band is assigned which will not cause harmful interference to stations in that area already assigned frequencies in accordance with the Table of Frequency Allocations.

NG11 Television inter-city relay stations may be authorized to use frequencies in this band on the condition that harmful interference will not be caused to stations operating in accordance with the Table of Frequency Allocations.

NG12 Frequencies in the bands 454.40455 Mc/s and 459.40-460 Mc/s may be assigned to domestic public land and mobile stations to provide a two-way air-ground public radiotelephone service.

NG13 In those portions of the States of Texas and New Mexico in the area bounded on the south by parallel 31°53′ N., on the east by longitude 105°40′ W., on the north by parallel 33°24′ W., and on the west by longitude 106°40′ W., the frequency band 220-225 Mc/s is not available for use by amateur stations engaged in normal amateur operation between the hours of 0500 and 1800 local time Monday through Friday, inclusive, of each week. However, the entire frequency band 220–225 Mc/s shall be available in all areas to those amateur stations authorized to operate in an organized civil defense network during all periods when civil defense emergencies exist and, in addition, special arrangements for civil defense drills between the hours and within the area set forth above may be made upon mutual agreement between the Federal Communications Commission Engineer in Charge at Dallas, Texas, and the Area Frequency Coordinator at White Sands, New Mexico, if it appears necessary to conduct such drills. Such arrangements shall specify dates and times, and will depend upon the degree of use of the frequency band at White Sands at any particular time.

NG14 Stations in the radiolocation service shall not cause harmful interference to stations in the disaster communications service between sunset and sunrise or at any time during an actual or imminent disaster. Conversely, stations in the disaster communications service shall not cause harmful interference to stations in the radiolocation service between sunrise and sunset except during an actual or imminent disaster.

NG15 (a) The amateur service may use, in any area, whichever bands, 1800-1825, 1875-1900 or 1900-1925, 1975-2000 kc/s, are not required for LORAN-A in that area, in accordance with the following conditions:

(1) The use of these frequencies by the amateur service shall not be a bar to the expansion of the radionavigation (LORANA) service;

(2) The amateur service shall not cause harmful interference to the radionavigation (LORAN-A) service;

(3) Only types A1 and amplitude modulated double and single sideband telephony emission shall be employed;

(4) Amateur operation shall be limited to: